Madonna is "glad" she divorced Guy Ritchie. The "4 Minutes" singer was speaking to fans on her long-time friend and producer Guy Oseary's Twitter page when one admirer wrote: "Hello Madonna honey am glad you are single again - you made your best music as a single woman! yeehaw! [sic]"

Just minutes later the singer apparently replied: "NOT AS GLAD AS I AM! M."

Mariah Carey has been visiting a fertility clinic. The 38-year-old singer and her husband Nick Cannon - who married last year following a whirlwind romance - were seen leaving a Beverly Hills' Southern California Reproductive Center last week, where they reportedly met with a prenatal specialist.

A source told gossip blogger Perez Hilton: "Nick and Mariah are trying anything and everything to conceive. After almost a year of trying to natural way, they visited a fertility clinic to help make their baby dream come true."

Jessica Simpson is "actively trying" for a baby. The singer-and-actress is reportedly desperate to start a family with her American football star boyfriend Tony Romo after her younger sister Ashlee gave birth to her first child, son Bronx Mowgli, last month.

A source told gossip blogger Perez Hilton: "I wouldn't be surprised if Jessica makes an announcement that she's pregnant very, very soon."

Avril Lavigne's husband has warned Paris Hilton's ex-boyfriend to stay away from her. Rocker Deryck Whibley was reportedly furious after he discovered Avril had been out for dinner with oil heir Brandon Davis - who has also dated Lindsay Lohan - and texted his love rival saying: "Stay away from my wife."

However, a source is quoted by gossip blogger Perez Hilton as saying: "Avril assured Deryck that it was a business dinner about art, since Brandon also makes a living as an art broker. Deryck trusts his wife, it's just Brandon he doesn't trust."