Alesha Dixon has quit her judging role on BBC talent show Stricly Come Dancing for Britain's Got Talent, saying it was time to "move on".
A statement on her website said: "Alesha has decided not to return to Strictly Come Dancing after a successful three-series run and will instead be joining the Britain's Got Talent panel, alongside Simon Cowell, Amanda Holden and David Walliams."
After three years on the show the 33-year-old said the decision to leave was hers: "After three incredible years on the Strictly Come Dancing judging panel I have decided that it is time to move on.
"Strictly Come Dancing will always hold a special place in my heart as it has been such an amazing experience, both as a winning competitor and as a judge.
"I would like to say a big thank you to everyone involved in the show, the production team, my fellow judges, and a very special thank you to the fans for their support."
Dixon won Strictly with partner Matthew Cutler in 2007. She returned as a judge, controversially replacing Arlene Phillips in 2009.
The former Mis-Teeq member released her last solo album, The Entertainer, in 2010.
A BBC spokesperson said a new panel would be released in "due course".
"Alesha has had three very successful series and we wish her well for the future.
"The BBC gave her a fantastic opportunity and she has really grown her career and she is now off for a different challenge."