Paparazzi Photo

"Splash" -- formerly known as "Celebrity Diving" -- seems like just another reality TV show ... until you see Katherine Webb in a bathing suit.

The former Miss Alabama USA -- famous for her cameo at the BCS National Championship this year -- donned the magenta monokini earlier today while filming a show segment in L.A..

Rockin' her best Kate Gosselin soccer mom chic, Britney Spears didn't need a conservator when she hit up a Los Angeles supermarket this weekend ... because she had a grocery list to help her remember what she needs, y'all.

Included in the 31-year-old mother of two's list were: ginger ale, tomatoes, Lunchables, ham, orange juice, 2% milk, Smart popcorn, bread and chicken.

It's a mystery wrapped in a riddle inside an enigma -- who did Britney Spears go out to dinner with on Valentine's Day? The even bigger mystery ... why are Britney's reps so secretive about it?

The photos of Britney and John Doe #1 surfaced late last week and TMZ reached out to Britney's reps multiple times over the course of 3 days -- asking a simple question ... who's the dude?

Each time, we were told they were trying to figure it out and would get back to us.

After 8 calls ... we're starting to think they don't want to tell us ... so we're turning to you. If you have any information as to the true identity of Doe #1, please contact TMZ immediately.

Rihanna capped off a night of partying in London with a bloodied knee after someone allegedly threw a bottle in her direction ... and screamed things at her about Chris Brown.

According to reports, RiRi was leaving a club called The Box when someone threw a bottle of Lucozade (a UK energy drink) in her direction. The bottle didn't connect, but Rihanna allegedly scraped her knee during the commotion when she brushed up against a metal shop grate.

Rihanna was in town for London Fashion Week.

We reached out to a rep for RiRi -- so far, no word back.

John Mayer might just be the luckiest guy on the planet -- because he spent his Valentine's Day alone in a dark room with Katy Perry ... and more importantly, Katy Perry's boobs.

J & K celebrated the holiday of love last night by hitting up the historic Vista Theatre in East Hollywood -- and the photographer who shot the pics tells us, he didn't see a soul enter or leave the theater the entire time they were in there ... roughly two hours.

The theater wouldn't comment on whether John and Katy rented the place out for their own personal use -- but that's the only logical conclusion. Pretty baller.

"A Good Day to Die Hard" is the only movie currently playing at Vista ... but it's unclear if that's what the couple actually watched ... because Katy was spotted leaving the place holding a DVD.

Comedian Louie Anderson is training for one of those new celebrity diving shows -- along with the likes of super babe Katherine Webb and NFL star Ndamukong Suh -- but everyone else just pales in comparison.

The 59-year-old showed off his pearly white wet dewy flesh after performing a big dive in L.A. on Thursday.

Things haven't exactly been going swimmingly for the comic -- he had to be pulled out of the water a few weeks ago after a mishap in the pool.

Hoping to stay alive long enough to see his newborn kid graduate elementary school, 67-year-old Steve Martin worked on his fitness by hitting the road on his workout bike this week.

Martin's rep just confirmed that the actor's 41-year-old wife Anne Stringfield gave birth to their first child back in December ... but the couple hasn't revealed the sex or name of the child.

It's only been one month since Mallory Hagan won the title of Miss America 2013 ... after KILLING IT in the swimsuit competition ... and it appears she's back to eating like a normal human being again.

24-year-old Hagan was spotted rocking a pink bikini in Hawaii yesterday ... still looking incredible ... with a little more to love.

Sometimes ya just gotta let loose.

Will Ferrell is a Vagina ... Ted Vagina, to be exact ... at least according to the name tag he wore at the Lakers game last night.

Ferrell -- sporting a nicely manicured moustache -- threw on a Staples Center usher uniform (complete with the Vagina name tag) ... and went to work on the court ... keeping the floor safe from basketball hooligans.

At one point, Ted put Shaquille O'Neal in an arm bar -- and escorted the big guy off the court.

Vagina always gets his man.

Turning 32 must really suck -- because yesterday in L.A., "Destiny's Child" singer Kelly Rowland could hardly keep it together after her birthday lunch with Beyonce and Jay-Z.

Kanye West and Kim Kardashian are definitely below Will Smith ... at the hotel they are all staying at in Rio de Janeiro.

While Kim and Kanye took what appears to be selfies on their hotel balcony on Monday, Will and a pal enjoyed the view from the room one floor above them.

Earlier in the week, Kim, Kanye and Will were all spotted together on a local walking tour.

Rihanna and Chris Brown's new romance has already gone to pot -- the couple celebrated CB's zero Grammy wins by hitting up a Hollywood nightclub last night ... and lighting up what appears to be a joint.

Chris and Rihanna -- who won her 7th Gram last night for her "We Found Love" music video -- dropped by Supperclub for a private party ... and according to sources inside the venue, the whole place was filled with pot smoke.

It's the first time the couple's been together on Grammy day since 2009 ... and we all know what happened then.

And there's this -- Chris was shot driving away from the club with Rihanna in the passenger seat at around 3:20 AM ... which would be a big issue if he's driving under the influence of pot -- a big issue because he's on probation for beating his passenger to a pulp.

For the good of all mankind, the gorgeous ladies did what they do best and poured all of their luscious golden lady bits into skimpy frilly lingerie -- and super high stiletto heels -- and struck some amazing poses.

With her beleaguered blonde weave in need of a tune up and rockin' some Whitesnake groupie heavy black eye makeup, a low cut animal print top from the Forever 21 sale rack, and a pair of badly dyed bleached out jeans last seen leaving a Bon Jovi concert in 1988, newly single Britney Spears made a much needed trip to a beauty salon in Westlake Village on Sunday.

As TMZ first reported, the paparazzi who were on the scene when Brown crashed his Porsche claim they were not involved with the accident and only arrived on scene after the fact.

But Brown is sticking with his side of things ... and his rep tells TMZ, "We plan on seeking criminal charges and holding them civilly liable."

Stay tuned ...