The President gave praise to the pop star and her 91-year-old grandmother who she got to introduce to Obama
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(WENN) - Pop star Katy Perry's 28th birthday got off to a good start on Wednesday after U.S. President Barack Obama gave her an "unforgettable" shout-out at a campaign rally in Las Vegas.
The singer, who turns 28 on today (Thursday), showed her support for the Democratic candidate by wearing a ballot-inspired latex dress to perform at the 'America Forward' fundraiser in Sin City, where she had the chance to introduce her 91-year-old grandmother Ann Hudson to the President.

Obama later told the crowd, "I am so grateful to Katy Perry for the unbelievable performance. Getting to know Katy, she's just a wonderful young lady, and I can tell that part of it is because of her outstanding grandma Ann, a 50-year resident of Nevada, so give her a big round of applause."
Perry later took to Twitter to share her delight, writing:
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