The Promise This singer thinks that the birthday bash will mark a new beginning for her after having a tough time recently, during which she was axed from her judging role on the US X Factor, battled malaria and divorced her cheating husband Ashley Cole.
The pop star is said to have sent a purple and black invite to friends including her fellow Girls Aloud band mates, record company executives and X Factor judges - but the location has so far been kept secret.
According to British newspaper the Daily Star, the message reads: 'You are invited to celebrate Cheryl's birthday. Friday 1st July. 9pm til late. Venue to be advised. London.'
The invite also hinted that her friend, Black Eyed Peas singer Will.i.am, is behind the bash as the email address that guests are asked to send their RSVP to is @iambizzy.com, thought to be his address.