United Kingdom, Aug. 3 -- Cheryl is reportedly planning to sign up for a major documentary about her life's highs and lows in what will mark a career comeback for the singer.

The Girls Aloud star, who first found fame on the TV show Popstars: The Rivals, has been off the radar following a difficult few years, which saw her mourn the death of former partner and father of her son Bear, Liam Payne.

However, according to The Sun newspaper, the 43-year-old is in the midst of signing on the dotted line for a film about her career success, as well as her complicated personal life.

A source told the publication: "Cheryl is incredibly picky about what she chooses to do these days and spends a lot of time on motherhood, but she feels like she ha...