Katy Perry and John Mayer are off again. Were we not just hearing rumors that these two were engaged?

Sources close to the on-again, off-again couple exclusively told E! News that Perry broke things off within the last few days.The reasons behind her decision have not been made clear, but she has been seen out and about without Mayer, including on her trips to London and Milan.

This is the third time the hot couple has broken up since first pairing off in summer 2012.

Most recently, Perry and Mayer collaborated on the song "Who You Love" for Mayer's latest album, Paradise Valley. The two were not shy about their feelings for one another, making us believe they were happily on their way to the altar.

We're guessing that giant rock on Perry's finger was just a part of her upcoming jewelry line for Claire's.

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