Lady Gaga Dines With Lisa Vanderpump at PUMP in West Hollywood: Pics

Lady Gaga and Lisa Vanderpump dined together at her West Hollywood restaurant PUMP on April 17. Credit: James Devaney/GC Images; Lilly Lawrence/WireImage

Even Lady Gaga thinks Vanderpump Rules! The "Applause" singer, 29, was spotted dining out on Friday, April 17, at Lisa Vanderpump's West Hollywood restaurant PUMP with the reality star, her mother Cynthia Germanotta, and her manager. 

Businesswoman and LGBT ally and activist Vanderpump, 54, was delighted to have the Grammy winner for dinner, and tweeted about the event afterwards. 

"it was kind of funny,but nobody bothered us all night...I think people thought I was having dinner with a lookalike!" Vanderpump said of Gaga, who wore an all-black ensemble with giant shades. 

It seems the pair had a lot to talk about at dinner, with Vanderpump tweeting, "Cosy dinner @ladygaga ...At PUMP ...woman after my own heart #lgbt #dogcrazy."

In addition to their common interests, Vanderpump (and some of her Real Housewives costars) appeared in the music video for Gaga's single "G.U.Y." back in March 2014, and the restaurateur remains a big fan of Gaga's music. 

As the crowd grew outside the restaurant, Vanderpump escorted Gaga to her car, giving her a hug and thanking her for coming. It looks like Jennifer Lawrence might have some competition for biggest Real Housewives fangirl