Drew Lachey and Bristol Palin Credit: JB Lacroix/WireImage.com; Frederick M. Brown/Getty Images

Bristol Palin was shown the door on this past Tuesday's Dancing with the Stars -- but singer (and experienced dancer) Drew Lachey went home first, and vented backstage on Oct. 9 about that the single mom, 22, had outlasted him on the ABC smash.

The 98 Degrees crooner, 36 -- who won season 2 of DWTS -- vented backstage and "threw a fit," a source tells Us Weekly.

"He was complaining that Bristol has no talent and no reason to be there," the source continues of Lachey's rant against Sarah Palin's eldest, who made it to finale of season 11 back in 2010.

According to the source, Lachey bellowed, "Am I on the right show? I thought this was Dancing with the Stars" and called Palin "a joke."

But a show insider sticks up for the Not Afraid of Life: My Journey So Far author: "She's not the best dancer, but she's not terrible. She gets a bad rap because of her family."

"I think I was optimistic about every week. I'd never been in the actual bottom two, so it was hard to process it all, but it is what it is," Palin, mom to son Tripp, 3, said after her Oct. 16 elimination. "Good luck to everyone else."

"It really sucks!" Lachey told Us following his elimination one week earlier. "Do I think we're going home too early? Absolutely. I don't think there's anybody in this ballroom who would disagree with that [and] I don't think I'm speaking out of turn by saying that."