#1's is a compilation album released by R&B group Destiny's Child. It was released on October 25, 2005 charting at #1 on the Billboard album chart, and at #6 on the UK album chart. It is the best selling greatest-hits album by a female group. Despite the album's title, only 5 of the singles went to the #1 spot on the Billboard Hot 100, and one single, ("Check On It") had all lead vocals sung by Beyoncé with an additional rap from Slim Thug.