The star, whose band have just released the album Mylo Xyloto, made the confession at the awards bash at The Grosvenor House Hotel in London.
Martin told the star-studded audience: 'U2 and five handsome, strapping men from Stoke and Manchester. I'm not afraid to admit it, they made me ask the question "Am I gay?"'
The singer was presenting Take That star Gary Barlow with an award for classic songwriter at the ceremony yesterday.
U2 drummer Larry Mullen Jnr joked later on: 'Chris Martin, I have the answer for you — you are gay.'
Read more: http://www.metro.co.uk/music/879644-coldplays-chris-martin-take-that-and-u2-made-me-question-am-i-gay#ixzz1byUup2Gf