Janet Jackson displays biceps

London: Pop star Janet Jackson seems to be following a strict diet regime, which has given her bulging biceps similar to celebrities like Cameron Diaz and Madonna.

Sporting a tight white vest and jeans, the 44-year-old singer gave a full display of her muscles at America`s Gibson Amphitheatre, suggesting a rigorous work-out, reported the Daily Mail. The `All For You` hitmaker, who has long suffered weight problems, seemed incredibly toned, a contrast from her heavier look four years ago. "There was a time when I was so down and felt so unattractive and it lasted for a very, very long time. I used to bang my head against the wall. "The person that I was with, my ex-husband at the time, I mean, he`d have to stop me," Jackson had said about her struggle to control her weight. PTI