Credit: ROBYN BECK/AFP/Getty Images

Prince Michael and Paris Jackson paid tribute to their late father Michael Jackson at the Grammys Sunday in Los Angeles, accepting the Recording Academy Lifetime Achievement Award on the King of Pop's behalf.

"We are proud to be here to accept this award on behalf of our father, Michael Jackson," said Prince Michael, 12, who stood on stage along with some of his cousins.

The boy then thanked "God for watching over us these past seven months and our grandma and grandpa for their love and support. We'd also like to thank the fans. Our father loved you so much because you were always there for him. Our father was always concerned about the planet and humanity. He has helped through many charities and donated to all of them. Through all his songs, his message was simple: Love. We will continue to spread his message and help the world. Thank you."

Before leaving the stage, Paris, 11, told the emotional audience (including Beyonce and Rihanna), "Daddy was supposed to be here. Daddy was going to perform this year, but he couldn't perform last year. Thank you. We love you, Daddy."

Earlier in the evening, Celine Dion, Carrie Underwood, Usher, Jennifer Hudson and Smokey Robinson, Jackson's godfather, performed a 3-D musical tribute to the singer, who died last June at age 50 of acute propofol intoxication.