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Katy Perry, John Mayer, Grammys

Larry Busacca/Getty Images for Sony Music Entertainment

Katy Perry and John Mayer back together again?! That seems to be the case.

Apparently, nothing is "for good" when it comes to this famous Hollywood pair, because a recent sighting suggests these two lovebirds haven't given up on their roller coaster relationship just yet.

Katy and John were spotted having dinner together at brand-new West Hollywood hot spot Ysabel on April 4, and according to an eyewitness, the duo didn't shy away from acting like a couple in love.

The pair, who were joined by another couple for the outing, engaged in some PDA by acting very cozy with one another and holding hands throughout the night, an insider tells E! News. The source also adds that they "definitely" looked back together.

Back in January, the exes sparked rumors of a reconciliation when they were spotted at dinner together at a friend's house in L.A. The 37-year-old hunk and the 30-year-old singer were all smiles during the party, and they were subsequently seen out together a number of times after the fact.

Mayer and Perry had dinner again at Sunset Tower and then traveled to Chateau Marmont where they enjoyed drinks with a few friends, including Allison Williams. "They seemed very comfortable together and kissed several times," a source told E! News at the time.

However, last month we got word that the twosome were on the outs again. According to the insider, Mayer was telling friends that they are "over for good" because of a "lack of emotional interest on his end." Or to be more blunt, Mayer told pals he "fell out of love with Perry but will always love her."

Regardless, the source tells us that Mayer still constantly talked about Katy and always brought her up, so maybe he had a change of heart?