Pop star Britney Spears has spoken candidly for the first time about her bitter split with former boyfriend Justin Timberlake in 2002.

The singer has revealed all in a forthcoming TV documentary Britney: For The Record, reports mirro.co.uk.

"With Justin, he was part of the magnitude of what I had become. So when he was gone I was like, 'What am I supposed to do with myself?' When it ended I felt so alone. I didn't really want to think about the reality of it. I never faced it - I just ran," she said.

The duo started dating in early 1999 before a high-profile split in March 2002 amid tabloid press speculations on Spears' infidelity with choreographer Wade Robson, a mutual friend of Spears and Timberlake.