When Cher stepped on stage during February's Saturday Night Live 50th reunion special in a glittering black Bob Mackie ...

Held at The Peninsula Beverly Hills, the auction saw more than 200 items go under the hammer, including rare pieces once owned and worn by Marilyn Monroe, Britney Spears, and other Hollywood icons.

Martin Nolan, Co-Founder and Executive Director of Julien's Auctions gave PEOPLE an exclusive look at the collection ...

A Bob Mackie outfit is not hard to ... One of those moments includes seeing Cher on the cover of Time Magazine in 1975 wearing his naked dress, "looking very glamorous and very much not at all ...

Some iconic outfits worn by some even bigger icons hit the auction block this weekend. The star of the Julien’s Auction was Cher’s famous barely-there outfit she wore while singing “If I Could Turn ...