30 January 2013 11:35 AM, PST | Access Hollywood | See recent Access Hollywood news »

It appears the Inauguration honeymoon for Katy Perry and John Mayer is over!

After attending President Obama's second Inauguration together earlier this month, reports are surfacing that the music couple are no longer singing each other's praises.

According to Life & Style, Katy showed up at an after party for Muse in Los Angeles earlier this week and was spotted getting cozy with the band's drummer Dominic Howard.

"They were all over each other," an eyewitness told the mag. "I was shocked to see her acting so affectionate with another rock star because I thought she was ...

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