Teen Mom

19-year-old Evans -- who's currently on probation stemming from a drug-related conviction -- was surrounded by beer and beer drinkers at Yaupon Pier in North Carolina Thursday.

Good news for Jenelle though -- prosecutors are giving her a chance to clear her record ... by performing 24 hours of community service, at which point the charge will be dropped.

Jenelle was arrested back in October with her boyfriend, after the pair allegedly broke into some abandoned North Carolina house to smoke pot ... and were busted with a bag of marijuana and a pipe.

Brittany Maggard claims Jenelle only got up the guts to fight Britany Truett -- the eventual ass-beat victim -- because Maggard, Maggard's sister, and their friend Nick had her back. Maggard says Nick had the video camera.

After the fight, Maggard claims she and Nick came up with the idea to sell the video -- and Jenelle not only thought it was a "good idea" ... but SHE called "someone she knows at a [photo] agency to purchase the video."

According to Maggard, they sold the vid for $5,000 -- and Jenelle wanted a bigger cut because, as she said, "You wouldn't get any money if I wasn't famous!"

Britany Truett -- whose bruises have healed -- left her attorney's office this morning in North Carolina, along with her baby daddy. They proclaimed, "there will be legal action" against both Evans and Brittany 'The Pusher" Maggard.

Brittany -- who is on probation for a separate assault case -- got on the wrong side of her probation officer, who found out about the "Teen Mom" fight first posted on TMZ. After Brittany's arrest this week, the Department of Corrections of North Carolina set the wheels in motion to have her popped for violating probation -- which requires her to obey all laws.

Brittany is bitter, telling TMZ it's not fair she's in more trouble than the other girls in the fight and all she did was push Jenelle. She says she's "terrified."

Brittany Maggard -- who's been charged with misdemeanor affray -- says yeah, she regrets instigating the fight alright, but only because she wishes she would have done it for a better friend.

Dustin Sullivan, Jenelle's lawyer, tells us he has a "serious problem" with the fact that Brittany Maggard -- the woman who pushed Jenelle before the brawl -- and other parties involved were "paid substantially" for pictures and videos related to the incident.

Sullivan says it's suspicious that cameras were present when Jenelle arrived -- indeed, Sullivan says, multiple cameras were present capturing different angles of the impending brawl.

Sullivan is in the process of interviewing witnesses to determine if Britany Truett -- the woman who caught the beatdown -- pre-programmed the melee.

And, Sullivan says, it's "highly suspicious" Britany waited five days before calling the cops.

Jenelle Evans, Britany Truett and Brittany Maggard have been charged with misdemeanor affray -- disorderly conduct by fighting in a public place.

TMZ posted the story earlier that the girls were arrested, but now the Brunswick County D.A.'s Office has officially charged all 3.

Brittany Maggard, the pusher, tells TMZ ... "Jenelle wanted to go and fight Britany because of something with her man. She was scared and wouldn't go fight by herself so I went to help her out."

Maggard continues, "Ya I instigated it, but what the hell are we supposed to do? I wanted to see them fight!"

And get this! Maggard says, "I'm pissed though because I went down to help her out, we both ended up in jail, she got bailed out before me and when I called her to get me out, she didn't come." No loyalty.

And of course, the mugshot: "I'm just glad my mug didn't show my socks. My socks weren't matching. I had one Spider-Man sock and one green sock on."

One day after the rumble-on-tape, Britany Truett took photos of the damage to her eyes, neck and chin ... photos that could be evidence now that both women have been arrested over the fight.

Britany Truett (left) -- the woman who got beaten -- as well as Brittany Maggard (right), the pusher, were both arrested. They were released on $500 bond.