Check out the T-shirt Britney wore and signed while she was a cast member on the Mickey Mouse club, including other autographs from fellow Mickey Mousers including Christina Aguilera & JC Chasez. Britney gave her Grandma the shirt years ago, but is now being auctioned off to the Gotta Have It Now! charity event. According to People.com, "Proceeds from the sale of the Spears memorabilia, which was provided by Tri Star Sports and Entertainment Group on behalf of the singer, will go to a charity of Tri Star's choosing. The company's owner, Lou Taylor, is a spokesperson for the Spears family."
"Something like that has never come up for auction before," Gotta Have It! owner Ed Kosinski tells People.com. "We expect it to go for between $15,000 and $20,000."
Glad it's for a good cause!