Rumor has it that Britney Spears and her hubby, Kevin Federline, had a major blow out during a Kanye West performance at the Rolling Stone/Verizon Wireless Pre-Grammy party.

According to party-goers, it was shortly after midnight and Kanye had only been on stage a few minutes when Kevin and Britney got into a disagreement which turned into full blown yelling and screaming.

Baby's momma to Britney Spears' husband, Kevin Federline, actress Shar Jackson has come forward and says she was "horrified" by the now infamous photos of Britney driving with her five-month-old son in her lap, rather than a car seat.

Shar goes on to say she "couldn't believe her eyes when she saw the pictures." A source revealed that Shar continued her rant exclaiming, "What was that [expletive] thinking? Is she crazy? What kind of mother is Britney?'"

Britney Spears has come under fire this week after photographs captured her driving with her infant son, Sean, in her lap.

Spears says she had been trying to escape an aggressive swarm of photographers and didn't feel as though she had time to strap Sean into his car seat.

Shar Jackson, Marla Maples and Angie Everhart are teaming up for a new reality series produced by ABC, called "Ex-Wives Club."

The show will have the trio helping newly divorced or separated men and women to reclaim their lives. Jackson has two children by ex Kevin Federline (now Britney Spears' hubby); Angie Everhart was formerly married to Ashley Hamilton and dated Sylvester Stallone for a number of years; and Marla Maples, famously divorced from Donald Trump.

Britney Spears defended photographs showing the pop star driving with her infant son on her lap, saying she was dodging the paparazzi.

Several photos published today show Spears driving her SUV in Malibu, Calif., with son, Sean Preston, on her lap, rather than strapped into a car seat in the back. Spears said she did it because of a "horrifying, frightful encounter with the paparazzi."

Friends of former lovers Justin Timberlake and Britney Spears have revealed that Justin called Britney when he heard that she was miserable in her marriage to former backup dancer Kevin Federline. Justin is rumored to have asked Britney point blank, "Are you happy?"

The source goes on to say that Britney paused for a few seconds then said, "Sometimes, you know how it is." Adding insult to injury, Justin said, "Actually, no I don't know!" Rubbing in her face the relationship he is enjoying with older girlfriend, actress Cameron Diaz.