Yes, Rihanna is an awful combination of annoying and crazy, but she did bless us with this photo of her new underboob tattoo in a tweet she sent out on Sunday. She claims it's a tribute to her dead grandma. Oh, grandma would be so proud. What's the over/under 'til she kills a dude during sex while having a mental breakdown? Check out Rihanna's Mug Shots here.