Besides her gal pal Nicki Minaj and friends/collaborators Justin Timberlake, Usher and Pharell, and the several other artists, whom she's worked with throughout her enormous career, there aren't too many musicians Beyoncé has openly acknowledged that she likes.

That all changed when she and hubby Jay Z attempted to slip into the VIP section of Britney Spears' "Pieces of Me" residency in Las Vegas.

However, when you're one of the most powerful couples in music, you don't just "slip" in anywhere.

One concert goer told E! News " No one had any idea that they were coming. It was a huge surprise." Another concertgoer added, "We all thought the president or Britney herself had come out [the crowd] was that crazy."

Meanwhile, Bey got her entire life dancing and singing along to Britney's iconic catalog that we all secretly (or not-so secretly) hold close to our hearts. "[Beyoncé] sang the classics like ‘Baby One More Time,' ‘Oops! I Did It Again' and ‘Stronger,'" one eyewitness told E!. "She seemed very excited to hear ‘Me Against the Music' too. She was definitely happy to be at the show."

Britney announced back in September that she's planned to extend her residency in sin city. Tickets are on sale now for dates up to April 2016. 

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(Photos from left: Beyonce via instagram, Jason Merritt/Getty Images)