Katy Perry, John Mayer Reunite, Flirt at Her Memorial Day Party

Celebrity News May. 28, 2013 AT 12:20PM
Katy Perry, John Mayer Reunite, Flirt at Her Memorial Day Party Credit: Christopher Polk/Getty Images

For Memorial Day 2013, Katy Perry kicked off summer with a few good friends -- including John Mayer. Two months after their second breakup, the "Shadow Days" troubadour, 35, was among the guests at Perry's brand-new Hollywood Hills home on May 27 for a barbecue bash, Us Weekly can confirm.

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Whether the reunion signals a full-on reconciliation for the pair remains to be seen. "They seem to be back together -- or back together-ish," one observer tells Us of Mayer and Perry, 28. "They were very flirty and having a really good time together. They have good chemistry."

Adds another witness: "They were definitely friendly."

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Other revelers for Monday's party included Girls star Allison Williams and boyfriend Ricky Van Veen -- who double dated with Perry and Mayer at the Grammys in February --- plus Mindy Kaling, BJ Novak, 2 Broke Girls' Beth Behrs, Raising Hope's Shannon Woodward, plus actresses Kate Micucci and Riki Lindhome.

Us broke news of the pair's second split in mid-March; the twosome began a casual romance during summer 2012 and briefly called it quits in August before reconciling that September. (The "Teenage Dream" singer and Russell Brand finalized their divorce in early 2012.)

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"It's not over until it's over," another confidante told Us in March after Perry and Mayer's second split. "You have to see how things play out."

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