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OTRC: Katy Perry, John Mayer back together? See cryptic 4th of July photo

Katy Perry posted this Instagram photo of herself with someone who appears to be John Mayer, on the 4th of July, 2013. / John Mayer performs with The Roots at the Philly 4th of July Jam event on July 4, 2013 in Philadelphia. (instagram.com/p/bXk3iUP-db/ / twitter.com/katyperry / Mark Stehle / Invision / AP)

Is Katy Perry back with John Mayer?

The 28-year-old "Firework" singer posted on her Instagram page on the 4th of July holiday a photo that appears to show the two embracing while dressed in American flag attire. Their faces are not shown. Mayer, 35, was the headlining singer at the "Philly 4th of July Jam" event that day in Philadelphia event. (Both pictures are seen above.)

"Whose broad stripes and bright stars?!" Perry wrote.

The two singers had split around March but were seen together in June at a Friars Club event honoring legendary insult comic Don Rickles (see PHOTOS from the event, which was also attended by "Full House" alums John Stamos and Bob Saget). Perry and Mayer have not commented.

Perry talked about her love life in a July 2013 interview with Vogue magazine, saying she was "attracted to these broken birds." The singer was previously married to British comic and actor Russell Brand.

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