Singer Britney Spears is calling on her fans to join her in supporting GLAAD's Spirit Day.

The upcoming 6th annual Spirit Day supports efforts to combat the bullying of LGBT teens. Supporters are encouraged to wear purple on Thursday, October 15.

“Hi guys, it's Britney,” Spears says in an 11-second YouTube clip. “Spirit Day is October 15 and I'll be going purple to take a stand against bullying and support of LGBT youth. Join me by pledging your support at”

Spears will also fly one lucky #SpiritDay supporter and a friend to Las Vegas to see her perform her Planet Hollywood show, Britney: Piece of Me, and meet her backstage. To enter your name in the contest, sign the #SpiritDay pledge before Tuesday, October 13.

Past participants in Spirit Day include the White House, the Empire State Building, Oprah Winfrey, Ellen DeGeneres, Cher, Laverne Cox, Kim Kardashian, Demi Lovato, Ariana Grande, Shaquille O'Neal, Good Morning America, The Today Show, The View, The Talk, The Tonight Show, the NBA, the NFL, Major League Baseball, NASCAR, WWE, Facebook, Instagram, Twitter, Tumblr, the Las Vegas Strip, and many more.