MGK’S THORNY FOR MEGAN FOX

Isn’t it romantic?! Bloody Valentine singer MACHINE GUN KELLY, 31, concocted a diabolical design for his 35-year-old fiancée MEGAN FOX’s unique two-stone diamond and emerald engagement ring — intentionally making it cause pain! “The bands are actually thorns,” boasts the rocker. “So if she tries to take it off, it hurts,” he explains, adding “Love is pain!” Ouch.