She's just 16, but Jamie Lynn Spears already has a reputation for hard drinking in her hometown, Star reveals in its new issue.

And the pregnant teen has accepted she may never return to her glam life in Hollywood. Instead she and boyfriend Casey Aldridge have decided to keep the baby -- and even buy a double-wide trailer to start their lives together.

Star has also learned the Zoey 101 star has often cheated on Casey, the 18-year-old she has identified as the father of her child. "I know for a fact that Casey was not the first guy she slept with -- or the last," says one fellow teen in Kentwood, La. "There were at least two others. I know that 110 percent."

Another friend says that before her pregnancy Jamie Lynn partied hard but always in private. "Some people drink to have a good time. But she drank to get wrecked. She drank to get messed up and forget about her mother, her sister and all of that."

Just days before announcing her pregnancy in December, Jamie Lynn shocked a boy at a party by asking him for sex. "It's cool, I'm pregnant," she said. "I can't get pregnant again!"

Labels: Jamie Lynn Spears