Britney Spears turns 30 today and it seems as though the mother of two hears her biological clock ticking.  An insider tells People magazine, "Britney really wants to get married and have another baby," and adds that she and her boyfriend Jason Trawick have been "talking about marriage for a long time."

As for whether this marriage would be more successful that her first two, which ended in annulment and divorce, respectively,  the guy who directed Britney and Jason in her "Criminal" music video tells People that Britney's relationship with Trawick appears to be healthy and happy. "He's chill and cool, which goes well with Britney -- she's the same," says Chris Marrs Piliero. "They have a solid chemistry and a real bond and trust."

A close source tells People that Jason has stuck by Britney through her ups and downs over the past two years. "They're very much a family," says the source of Britney, Jason and her sons, adding, "[Jason's] been there every step of the way, through the good and the bad.  They have a fun, loving, meaningful connection. And he loves her boys as if they're his own."

Britney is looking forward to some post-tour downtime with family and friends, the source tells People, adding that even though Jason's been on the road with her the whole time, they're not sick of one another.  "They enjoyed every minute of it -- and it proves they're ready to take the next step." (Source - People Magazine)