Pentatonix share impressive a cappella cover of Lady Gaga in celebration of their 10th anniversary

Three-time Grammy Award-winning group Pentatonix are celebrating 10 years of singing together with a new cover of Lady Gaga's hit 'Telephone' - and we are loving it!

Putting their signature spin on the pop star's 2010 duet with Beyoncé, the quintet shared a snippet of them belting out the chorus of the song on social media.

Speaking about the cover, baritone singer Scott Hoying said: "The very first time we all sang 'Telephone' together as Pentatonix was literally the day before our audition for The Sing-Off: June 4th, 2011.

"The second we started singing, it clicked, and we all knew we had something very special.

"I absolutely cannot believe it's been 10 years already and I am incredibly grateful — and feel insanely lucky — that it's my job to harmonise and perform with my best friends."

The original lineup — which featured since-departed member Avi Kaplan on bass vocals — won the third season of the NBC show, winning the top prize of $200,000 and a recording contract with Sony Music.