Celebrities: Katy Perry, John Mayer still together -- and now he's met her parents

Uh, oh.

It's. Getting. Serious.

Katy Perry and John Mayer, the rock-star couple that pretty much everyone assumed would burn out as soon as the novelty wore off, continues to defy expectations.

Not only are Perry and Mayer still together after several months, but she reportedly took her beau home to meet her parents over Christmas.

Hopefully, someone spiked the eggnog.

"They're happy together and with her family for the holidays," a source told Us Weekly. "John really likes getting to know Katy's family better. They've spent a lot of time together and really enjoy each other's company."

It was a major step for the pair, who apparently rekindled their relationship after it seemed to fizzle a while back.

"She's been really depressed and needs attention," an insider told the New York Daily News, back when the pair was reportedly split up. "She really liked him and thought it was going to be something serious."

Gulp!