Washington. October 20: Donald Trump has bizarrely taken to dishing out relationship advice, telling Katy Perry she should be wary of John Mayer, with whom she has had an on/off relationship since the summer.
He tweeted: "@katyperry is no bargain but I don't like John Mayer. he dates and tells - be careful Katy (just watch!) (sic)."
The 66-year-old business magnate does have a point, as John has dated a number of famous women, including Jessica Simpson, Jennifer Aniston, Cameron Diaz and Jennifer Love Hewitt, and not always been private about it.
He once famously described having sex with Jessica as "like crack cocaine to me."
Trump recently even urged Robert Pattinson to dump girlfriend Kristen Stewart because she is a "dog" and will cheat on him again.
Katy and John got together in July, her first proper relationship since splitting from husband Russell Brand at the end of last year. (ANI)