Even her nan is bling! Katy Perry joins her diamond-cane carrying grandmother at 90th birthday bash

By DAILY MAIL REPORTER Family outing: Katy Perry and Russell Brand joined Katy's grandmother Ann Hudson for her milestone birthday She's made no secret of how close she is to her family - so when Katy Perry's grandmother turned 90, there was no way she was going to miss the celebrations.The chart-topping singer, and her husband Russell Brand, joined Ann Hudson for a party in Las Vegas on Wednes...