Jessica Simpson pours out her love to boyfriend Tony Romo during a performance on Valentine's Day.

"I'm celebrating the life I'm living right now," the singer told a packed auditorium in Rochester, NY while showing off a sexy black minidress, People magazine reports.

Speaking about "You're My Sunday," a song she co-wrote for Romo, Simpson, 28, told her fans: "Somebody came into my life and made me see myself in the best mirror possible."

Before ending her show with "Do You Know," the newly curvy Simpson revealed one of her favorite activities with her football player beau. "This song makes me want to suck face. I love kissing," said Simpson, "with the right lips, of course."