Britney Spears hasn't even started her Las Vegas residency yet, but it's rumored that she's already got big plans for when it's over: settling down and maybe having a new baby with her cute new boo, David Lucado.

"Britney has been talking about her hopes to have a baby when her Vegas residency ends," a source told British magazine Closer (via Xpose Entertainment). "They want David to be the stay-at-home dad while she's performing, and says he can't wait to be hands-on."

The source added that one of the reasons behind Spears' and former fiancee Trawick's split was that she wanted more kids but that he wasn't ready.

Still, that doesn't mean Spears is ready to pop out a baby right now. In fact, she's enjoying her toned bod.

"Britney's in the best shape she's been in for years. Being with David has really inspired her. He makes her really happy and she wants to look sexy for him," the source added. "Although she already looks amazing, Brit wants to get back the six-pack she had in the 'Slave 4 U' video which she filmed when she was 19 - she's hell-bent on looking perfect."

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