Cheryl Cole is spending £20,000 on a lavish birthday party for herself.

The 'Parachute' singer has not been seen in public since being fired from the US 'x factor' and turning down an offer to return to the UK show last month but plans to celebrate turning 28 tomorrow (30.06.11) with a spectacular bash at an undisclosed London location on Friday (01.07.11).

According to the Daily Star newspaper, the stylish purple and black invitation sent out to friends - including her Girls Aloud bandmates, record company executives and some former 'X Factor' colleagues - reads: "You are invited to celebrate Cheryl's birthday. Friday 1st July. 9pm til late.

"Venue to be advised. London."

It is not known if Cheryl's ex-husband Ashley Cole - who she is rumoured to be considering reconciling with - will be at the party, but her friend and new manager is expected to be there.

The email address guests are asked to RSVP to ends with, which is thought to be an address for the Black Eyed Peas star.

Though Cheryl hasn't been seen in public since her 'X Factor' axing, she recently took to her website to reassure fans she is OK.

She said: "I have had the weirdest past few weeks (nothing unusual there though.) I wouldn't even know how to begin to tell you all about it.

"I have had the time that I have not had in so long to just chill with my loved ones and do the normal things that I like to do. See my friends and family and be with my doggys. It feels long overdue and sooooo good, even my feet are happy to not have to wear a pair of high heels hehe.

"It also breaks my heart a little when i hear that some of you worry about me and need to know that I am ok, so I want to PROMISE you that I am absolutely fine and more than OK! (sic)"