Perez Hilton — These two are certainly Hot N Cold! ICYMI: Katy Perry and John Mayer may be heating up again after they were spotted at The Grateful Dead concert in Chicago on Saturday. The two were reported to be cozying up on one another throughout the psychedelic... more info

TMZ — Katy Perry and John Mayer made the crowd roar at the Grateful Dead concert in Chicago Saturday night when cuddled out loud. They announced their split back in March but, as they say, nothing stays the same. more info

E! Online — John Mayer is not done changing. Or at least, that's the working title of his new song, which he debuted on stage at the Cool Comedy - Hot Cuisine fundraiser in Los Angeles, hosted... more info

TMZ — John Mayer just got his clock cleaned in a lawsuit in which he claimed he was defrauded by a watch dealer ... because John has not only dismissed his suit ... he now says his claims were false. TMZ has obtained a joint statement between Mayer and… ... more info

Perez Hilton — So, it's safe to say there's something going on between Katy Perry and John Mayer, right?? If you think they're just friends, you've got another thing coming! Even though her former rumored BF Diplo was in attendance at the Met Gala on Monday evening... more info

Brooklyn Vegan — Are the Grateful Dead's 50th Anniversary / Fare Thee Well shows turning into the Long Goodbye? Billboard reports that, in addition to the two shows in California and three in Chicago this summer, surviving members of the Dead are... more info

Perez Hilton — Sounds like these two just CAN'T get enough of each other Katy Perry and John Mayer are practically the definition of an off-again on-again couple — mainly because of all the times they've been rumored to part ways and hook back up! [ Related: Katy... more info

Perez Hilton — Cody Simpson's new song… is it actually thoughtful?? Well, we'll let you decide! The Aussie singer received some backlash after he released his new single Thotful. Though the tune has a nice, laid-back John Mayer vibe, many people believe the song ... more info

MTV.co.uk News — Radar Online reports that their recent reunion was for 'connivence' and that K-Pez may have already moved on... more info

L.A. Times - Entertainment — Taylor Swift's Spotify stance is getting some legs among other artists, namely her ex John Mayer. more info