Rivers Cuomo -- who wasn't allowed to fly last month due to the punctured lung he suffered in a freak bus accident -- is back in the air ... and come tonight, he'll also be back on stage.

The limping
Weezer front man hopped a plane at LAX that was bound for Florida yesterday -- where he'll play his first concert with the band since the bus accident that left him with the busted lung and a wounded spleen.
According to the band's website, Rivers has been "given a cautionary clean bill of health - so long as he takes it easy and is careful." Translation: No crowd surfing.
Weezer frontman
Rivers Cuomo was given the go ahead to leave the hospital today after his freak bus accident -- and get this, he's on doctor's orders to get back on a bus.
According to the
band's official website, which just posted this photo of Rivers in his hospital room, the group has to get to L.A. -- but due to Cuomo's punctured lung, he's not allowed to fly.
FYI -- The band will be driving the southern route across country ... to hopefully avoid that nasty black ice that set off the previous crash.
It's the first shot we've seen of
Weezer frontman
Rivers Cuomo since he was busted up in a freak bus accident -- and while he's still got some recovering to do, he's got his raditude in check.

According to the band's official
website -- which posted this picture of the visibly scratched up singer -- Cuomo finally walked yesterday -- the first time since Sunday's crash... though he did use a walker.
Cuomo's internal injuries, which include a punctured lung and wounded spleen, are also "continuing to improve."
He's expected to be released in the next few days.
Rivers Cuomo, the lead singer of
Weezer, is making significant improvements on his health, after puncturing his lung and damaging his spleen in a freak bus accident over the weekend.
Cuomo "went from being barely able to talk and open his eyes yesterday to partially sitting up, talking clearly, reading books and checking the internet," this according to the
band's official website.
According to the site, Rivers' blood pressure has stabilized, his spleen is "no longer leaking" and his lung is "gaining strength."
Today's big test: Whether he can stand up. If so, he could be out of the hospital "pretty soon."
Weezer frontman
Rivers Cuomo was hospitalized after the band's tour bus crashed into a ditch -- and now the band's webmaster is releasing photos of the terrifying aftermath.
Karl Koch, the group's unofficial "fifth member," posted the above pictures on their website -- which show the serious damage the bus took and the rescue effort to get everyone out.
Rivers, seen laid out in the inset above, suffered three cracked ribs while his assistant Sarah sustained two fractured ribs and a fractured lower vertebrae. Sarah was released but Cuomo is still in the hospital under observation.
The band also announced the cancellation of the rest of their
Raditude tour -- Koch says they will try and reschedule.

The lead singer of
Weezer was hospitalized today after a bus he and his family were riding in crashed in New York.
Rivers Cuomo was taken to a hospital in Amsterdam this morning after complaining of rib pain -- luckily, his wife and daughter emerged unscathed. Only one other person was taken to the hospital.
The bus driver said the accident occurred at around 7:30 this morning, when he lost control of the vehicle after hitting a patch of ice. The driver said the bus went into the median, hit reflective posts, crossed back over the highway and crashed into a ditch.
TMZ has obtained a lawsuit filed by the rock group
Weezer against the Miller Brewing Company. The lawsuit, filed Thursday in Los Angeles County Superior Court, alleges the beermaker used the name 'Weezer' in several ads that ran in
Rolling Stone magazine in 2004. The lawsuit also names Miller's advertising agency and the production company that laid out the ads as defendants.
In the suit, the four members of the band (Rivers Cuomo, Brian Bell, Scott Shriner and Patrick Wilson) claim Miller used the Weezer name in the ads without their permission. The suit also claims the ads feature endorsements by other bands and musical acts with whom Weezer "do not wish to be associated with in any advertisement." Furthermore the lawsuit says the ads were "grossly misleading and deceptive" and they have been "damaged in an amount ... believed to be in the millions of dollars."
Calls to Miller Brewing Company were not immediately returned.