POP diva Mariah Carey,

49, revealed this week that her secret to youthful skin was bathing in milk.

Evergreen Nancy Dell’Olio, former inamorata of erstwhile England manager Sven-Goran Eriksson and theatre director Sir Trevor Nunn, has more expensive tastes.

Nancy, 56, has disclosed that she pours champagne into her bath. ‘I haven’t seen any picture of Mariah Carey recently but she doesn’t look that fit to me,’ Nancy tells me at a party in Mayfair. ‘I don’t think milk is working for her. Champagne is much better. It keeps me young.

‘Champagne gives you oxygen to your blood. This is scientifically proven. I like to drink it and I mix my bath with some drops of champagne.’