messer-twins-230.jpgTeen Mom star Leah Messer and current beau Jeremy Calvert are expecting twins!

This will be the second set of twins for the 19-year-old reality starlet, and she learned the news last week. Even though her pals reveal that she's broke, Leah apparently believes the new twins are "her ticket to fame and fortune." A source adds, "She thinks the babies will help her get her own spin-off show ... And that means a much bigger salary!

And get this -- the mag reports that Leah is determined to become an even bigger star than reality TV mom Kate Gosselin! She wants her own series and her own brand, just like Kate! the insider says.