Celebrity birthdays in April

37 of 110: Julian Lennon, a singer and son of late Beatles singer John Lennon and his first wife Cynthia Powell, turned 49 on April 8, 2012. Also on that day, the younger Lennon released the song 'Guess It Was Me,' the second single from his new album, 'Everything Changes.'

The singer Tweeted: 'Thanks to All for your Birthday wishes today! (Just at home in my jammies, working and rehearsing for upcoming Live Tv next week in the UK) x.' (Pictured: Julian Lennon appears in a photo posted on his Twitter page.) ( Photo / Magnolia Pictures/ Groundswell Productions/Hit The Ground Running Films)