AceShowbiz -

Britney Spears has sparked rumors she's gone under the knife in recent years. An expert has weighed in on how the "Slumber Party" hitmaker has changed in 2017, revealing to Life & Style magazine about the Queen of Pop's changing looks.

"First of all, loss of baby fat goes a long way to making the face look different," plastic surgeon Dr. Andrew Miller, who hasn't treated the 35-year-old singer, told the publication. "As to procedures she may have done, Britney always had a slight asymmetry between her eyes that appears improved in her later photos."

"Also the lips look a bit fuller and the nose is a little thinner," he added. But he later claimed that "everything does look natural so whatever she has done, it appears to have been done well."

Back in 2013, Britney admitted that she visited Beverly Hills plastic surgeon Dr. Raj Kanodia to get lip injections. "I've had lip injections before," the mother of two revealed to InStyle. She didn't admit to having gone under the knife, though.

But these days, the girlfriend of Sam Asghari appears to be embracing her recent self. "I like my 30's way more than my 20's. My 20's were horrible!" she once confessed. "[Being] in my teens was fun, but I like my 30's."

Britney has also been doing workout routine in the last few weeks. The "Oops!...I Did It Again" hitmaker has shared a bunch of photos and videos featuring her doing her workout sessions both outdoor and in gym as well as showing off her amazing figure in bikinis.