Ashlee Simpson and rocker hubby Pete Wentz are said to be the latest celebrity couple on course for a double dose of baby joy. Is there something in the water in Hollywood?

Pete's pal, hip hop artist, Tyga, confirmed the twin rumours at a pre-VMA party, telling reporters, “They’re having twins. They’re really happy.”

However, as word of Tyga’s comments spread, the couple’s rep went on the record calling the claims false.

Confusion around the baby buzz was fuelled earlier this year when Pete referred to the baby as "them."

Ashlee and Pete were married May 17 in her parents’ LA home. It was only shortly afterwards they informed the world of the pregnancy.