Lady Gaga “slayed” when she performed on X Factor, according to fans.

The music superstar graced the stage during the results show and many viewers said her set was “extraordinary” and “beautiful”.

Lady Gaga's performance was so beautiful, I loved it 😍 #XFactor pic.twitter.com/09Bul5Qvej

— Lady Gaga (@ryanleejohnson) December 4, 2016

OMG! 😭😭 I cry every time I hear @ladygaga sing #AMillionReasons live, she is EXTRAORDINARY! The best artist of all time! 😍😍 #XFactor #Gaga x

— Siobhan Linehan (@slinehan1) December 4, 2016

Gaga just slayed 💃🏼 stunning. #XFactor

— Natalie♡🍂 (@NatalieClem) December 4, 2016

However, some viewers think the show’s own Saara Aalto could give Gaga a run for her money.

Lady Gaga so out of tune. Could do with lessons from Saara! #XFactor

— Dickon Love (@dickonlove) December 4, 2016

Lady Gaga was ok I suppose... Saara would've done it better👀#XFactor

— Amy Miller (@XxAmyMillerxX) December 4, 2016

#XFactor Lady Gaga was bloody awful flat as a pancake Jeeze you can see just how good Saara is now LOL #getoff

— Widows Breath (@WidowsBreath) December 4, 2016

Oooh controversial!

Some canny viewers have got the right idea though – the powerhouse singers need to combine their talents.

Love to see Saara and Lady Gaga duet for the final #XFactor

— Jay Cee (@JayCee_888) December 4, 2016

Can you imagine a Saara and Gaga collaboration?? Can they do one now please? They're in the same building... #XFactor @saaraaalto @ladygaga

— Catharine (@peripericat) December 4, 2016

Gaga needs to duet with Saara next week #XFactor

— shane telford. (@MrShaneTelford) December 4, 2016

Sounds like a good idea!