The Human Rights Campaign (HRC), the nation's largest LGBT rights advocate, on Wednesday released a video starring singer Demi Lovato.

“I believe that love comes in all different shapes, sizes and colors,” Lovato says in the 45-second video for HRC's Americans for Marriage Equality campaign. “So, whether you're LGBT or straight your love is valid, beautiful and an incredible gift.”

“So, let's protect love and strengthen the institution of marriage by allowing loving, caring and committed same-sex couples to legally marry.”

“Please join me and the majority of Americans who support marriage equality,” she adds. (The video is embedded on this page. Visit our video library for more videos.)

The 21-year-old Lovato served as grand marshal at this year's L.A. Pride Parade and performed at NYC Pride's Dance on the Pier.

(Related: Demi Lovato: A lot of my spirit comes from my gay grandfather.)