Kevin Federline has revealed wife Britney Spears wasn’t the only one in their relationship that gained weight during Britney’s two pregnancies - and he’s not managed to shift it as quickly as Britney lost hers.

Kevin revealed recently: “I gain the sympathy weight and she loses it in two weeks after she has the baby… It’s daddy fat. It comes and goes.”

“[Britney] goes through different feelings about it. Sometimes she’ll tell me to get my butt in the gym and sometimes it doesn’t bother her.”

Britney herself has reportedly celebrated dropping down to a US size 6 (UK size 8 ) less than two months after giving birth to second son Jayden by spending $10,000 in an hour at Barneys in Beverly Hills. According to In Touch Weekly, Britney wanted “sexy but casual” clothes, preferring “soft, clingy” sweaters rather than the tracksuits she wore throughout her pregnancies.