LOS ANGELES (AP) — Attention little monsters: A dress worn by Lady Gaga is hitting the auction block.The sculptural black dress the pop star wore on the cover of Madame Figaro magazine in May of this year is expected to fetch more than $10,000 at Julien's Auctions' rock 'n' roll sale in December.Designer Irina Shaposhnikova said she's honored to have created a gown for Gaga."Lady Gaga is one of the most stylish and inspirational persons of this century," the designer said. "She looks amazing in this dress!"The prop gun Gaga fired in the video for "Born This Way" earlier this year is also available. It's expected to sell for at least $6,000, said Julien's Auctions' president Darren Julien.Other sale highlights include a sketch John Lennon drew of himself and Yoko Ono during their 1969 "bed-in," which could collect more than $50,000, and costumes he and Paul McCartney wore in the film "Help." Also available: A signed Gretch guitar from Bono's personal collection, stage-worn costumes from Mick Jagger and Kurt Cobain, and Cyndi Lauper's dress from the "Girls Just Wanna Have Fun" video.Bids will be accepted in person, online and by phone for the auction, which begins Dec. 1. The lots will also be on view for a free exhibition at Julien's Auctions beginning Nov. 21.___Online: www.juliensauctions.com ___AP Entertainment Writer Sandy Cohen can be reached at www.twitter.com/APSandy .