Taylor Swift, Calvin Harris" Relationship In Trouble? DJ Cheating On "Blank Space" Singer In Las Vegas

Fresh from the PDA at the Billboard Music Awards 2015, Calvin Harris is now reported to be cheating on Taylor Swift with a mysterious brunette while performing in Las Vegas.
According to the tabloid Star, as relayed by OK! magazine , Taylor Swift reportedly saw the photograph of Calvin Harris...
Taylor Swift, Calvin Harris" Relationship In Trouble? DJ Cheating On "Blank Space" Singer In Las Vegas