Demi Lovato wants to tell you something.

"I believe that love comes in all different shapes, sizes and colors," she says in a new 45-second public service announcement for the Human Rights Campaign's Americans for Marriage Equality effort. "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."

And she's not wrong. According to a recent ABC News/Washington Post poll, a majority (58 percent) of Americans now support same-sex marriage, an all-time high. Among people 18-29, support shoots up to 81 percent.

Check out the video: