Looks like singer and actress LeAnn Rimes has something else to flaunt along with her 5-carat oval engagement ring from new fiancé Eddie Cibrian.

Rimes displayed a much larger bust line during her recent post-engagement holiday with Cibrian in Cabos San Lucas, Mexico. Her filled-out chest on her trimmer-than-ever frame, which she showed off in several tiny bikinis, has tabloids asserting she's had breast implants.

Us Weekly has an unidentified source claiming Rimes indeed went under the knife, using the very same plastic surgeon as Cibrian's ex-wife, Brandi Glanville. "She got a boob job. She has always, always been insecure about her size. She was a small A-cup."

The star, however, has been making sly sort-of denials on Twitter. "I have an amazing spice rack on my top shelf, in my kitchen," she tweeted, adding a smiley face.

Later, she added this coy tweet: "The rumors are true...Eddie got chest implants."