Ricky Martin says fatherhood has taught him about "unconditional love".

The 'She Bangs' singer's two-year-old twin sons Matteo and VALENTINO have made him a lot less selfish because he always thinks of them before himself.

When asked what he has learnt from his children, Ricky said: "Heavy lessons about simplicity and unconditional love. I don't want to sound cliche, another father talking about unconditional love, but man, that's the way it is. You hear it all the time, but when you feel this other branch of love getting stronger and stronger every day, it's just amazing."

The 39-year-old pop star says hearing his sons - who were born via a surrogate mother in August 2008 - tell him they love him is the best thing that has happened in his life.

He told Parade magazine: "Every day they teach me different things. The love is there. When you have a two-year-old saying every other hour, 'Papi, te amo. Papi, I love you,' it can't get better."

It seems Matteo and Valentino are following in their father's musical footsteps as they both love instruments.

He said: "The other day I took them to a toy store and they went straight to this tiny piano. And I'm like, 'Look at the robot!' But no, it was the piano - both of them. So it's very beautiful."