Rod Stewart's moody Ruby

Rod Stewart has embarrassed his daughter Ruby by suggesting she has too much attitude to make it in the music business.The veteran singer - who has seven children with four different women - insists aspiring pop star Ruby, 19, has inherited his talent but her stubbornness will get in the way of her being successful.He is quoted by Britain's Daily Mirror newspaper as saying: "She's got a great voice but she's little cocky and doesn't want to learn from her old dad. Ruby marches to the beat of her own drum and won't listen to me. She'll find out the hard way."Rod, 61, recently angered his other daughter Kimberly after wrongly claiming she was suffering from a serious liver disease caused by her heavy drinking.Kimberly, 27, quashed the claims, insisting her father had a "big mouth".She said: "I love my dad, but sometimes he has a big mouth and not just when he's singing."I don't have a liver disease. I was exhausted and feeling sick from burning the candle at both ends, and my doctor told me to cut back on drinking and smoking, which I have, and I feel so much better."