 Complete the following phrase:  The Jacksons shared lead vocals and solo spots on some songs, but Michael Jackson, who had recently released his multi-platinum selling album, Off the Wall, handles most of the lead vocal and writing duties. Triumph was the Jacksons first album to reach number-one on the Billboard RB Albums chart since Maybe Tomorrow in 1971. The album sold over two million copies worldwide, and the Jacksons did not release another studio LP until Victory in 1984. On December 10, 1980, the album was certified Platinum for the sales of over 1 million copies in the United States. It was nominated for the Grammy Award for Best RB Performance by a Duo or Group with Vocals in 