21 is the second studio album by American R&B singer Omarion. It was released on December 26, 2006, by Epic Records and Sony Urban Music. The album was produced by Timbaland, The Neptunes, Eric Hudson and Bryan-Michael Cox and saw Omarion co-write every song on the album. The album's title was inspired from when Omarion turned 21 years old months before the album's release.

"Entourage" is a song by American singer Omarion. It was written by Omarion, Andre Merritt, and Eric Hudson for his second studio album 21 (2006), while production was helmed by Hudson. The song was released as the album's first single and reached the top 30 on the New Zealand Singles Chart and on the US Hot R&B/Hip-Hop Songs. The official remix features rapper 50 Cent.