The `Angels` singer is "very excited" about the impending arrival but admitted his spouse Ayda Field had asked him to keep quiet about the gender of their unborn baby. He said: "It`s a girl. I`m very, very excited about becoming a daddy. I can`t wait. The missus is, like, `Don`t go telling,` and I said, `I won`t.` "My life is amazing right now. It`s fantastic, you know." The 38-year-old singer is already planning to teach his daughter self-defence in order to keep her safe when she is older. He said: "I`m going to teach her football and karate and boxing. "That`s the first thing she`s going to learn to keep people like me and [best friend] Johnny [Wilkes] away." This Sunday (27.05.12) sees the return of Soccer Aid, a celebrity soccer match organised by the singer to raise money for Unicef, and Robbie admits he was surprised to discover prospective fatherhood has made him more passionate about the children`s charity. He said: "Becoming a dad myself has changed my perception of Unicef. "I didn`t realise it would, but it did. I have found it quite over-whelming. "We watched a video this morning about what Unicef does and I felt myself tearing up, in a way I maybe wouldn`t have done in the past. "It`s definitely pulling on the heart-strings even more now that I know I`ve got the responsibility of looking after a little life."