Lady Gaga dress, John Lennon sketch and other rock items up for auction

When celebrity items go up for auction, they're probably going to bring in the big bucks. But when those items once belonged to icons like Lady Gaga and John Lennon, they will 100 percent cost a pretty penny.

The Associated Press reported Julien's Auctions will be auctioning off a few of Lady Gaga's most popular pieces as well as other personal memorabilia from John Lennon, Bono and Mick Jagger in December.

One of those items is a sculpted, black dress Gaga wore on the cover of Madame Figaro magazine's May 2011 issue, which is estimated to bring in more than $10,000.

Gaga's "Born This Way" music video prop gun will also be on the auction block. The company's president, Darren Julien, said he expects the gun to go for at least $6,000.

However, those pieces are nothing compared to an original Lennon sketch of him and wife Yoko Ono, which is expected to sell for more than $50,000.

Those who wish to place bids can do so in person, online or by phone beginning December 1. Julien's Auctions will also host a free viewing of the items on Nov. 21 in Beverly Hills.

While the auction house has one of the most coveted Lennon pieces, London's Omega Auction House recently auctioned off his discolored tooth for $31,700!

You have to be a pretty huge Lennon fan to buy a rotting molar for more than 30 grand.