Gavin Rossdale says his wife Gwen Stefani finds pregnancy "tough."

Gwen, who already has a two-year-old son Kingston with the rocker, has been feeling very tired as she copes with the demands of expecting her second child.

Celebrity tyke Kingston Rossdale, son of Gwen Stefani and Gavin Rossdale, celebrated turning two in style on Sunday. Kingston and his celebrity friends, along with their babies, enjoyed an animal-themed bash at the family's Studio City, California house.

Although it was one day before his actual birthday, Kingston and his little pals didn't seem to mind. The party drew about 40 friends, including Nicole Richie, Joel Madden and their daughter Harlow, as well as Victoria Beckham and son Cruz and Christina Aguilera and her husband Jordan Bratman and son Max.

Gwen Stefani celebrated her son's second birthday with a star-studded bash over the weekend.

The 'Don't Speak' singer - who is currently expecting her second child with husband Gavin Rossdale - invited a host of Hollywood stars to the party at the couple's Beverly Hills home in honor of Kingston turning two.

P. Diddy says Kanye West changed his life.

The rapper credits the 'Stronger' singer for helping him rediscover his love of hip-hop music after watching a recent concert.

Gavin Rossdale finds marriage "challenging." The former Bush singer says he sometimes feels like "an appendage" because of the publicity his wife Gwen Stefani attracts - and hates being described as her "rocker hubby."

Gavin wrote on his MySpace page: "It's been a tough few years for me because I've been lost in how to define myself in the present tense. With that glare of the publicity on us, how can I not feel like an appendage at times?"

Katie Holmes and Victoria Beckham's friendship has become "strained", because of the singer's new Hollywood friends.

After becoming very close when Victoria moved to Los Angeles last year, Katie is now allegedly annoyed the Spice Girl is choosing to spend most of her time with new friends Eva Longoria and Kate Beckinsale.