The 22-year-old pop star's close friend, Linda Perry
, took the stage during the event to hold an auction. Perry has worked with a number of musicians, including Cyrus, Christina Aguilera
, Adam Lambert
and Gwen Stefani
, and she auctioned off a white piano that she's had some of them sign over the years. Before the bid began, Perry told Cyrus that she had to lick the instrument in order to help raise the bids.