ARIANA Grande left fans stunned after bringing out a special guest for a ‘mesmerising’ duet on the second night of her London tour shows.
The singer and actress, 33, is performing at The O2 for the UK leg of her Eternal Sunshine Tour.

On the second night, Ariana had a big surprise for the audience as Wicked co-star Cynthia Erivo joined her on stage.
The pair portray Glinda and Elphaba respectively in the smash-hit musical films.
An onlooker told The Sun: “The crowd absolutely lost their minds when Cynthia came on stage for the Wicked reunion.
“Cynthia and Ariana couldn’t stop beaming as they were reunited to sing For Good.
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“It was almost the end of the concert and everyone was shocked.”
They then went onto sing another song Called Get Happy/Happy Days Are Here Again
It comes after Ariana revealed she felt “overwhelmed” with emotion on stage as she thanked her fans for their support.
At the opening night of the UK leg of her Eternal Sunshine Tour, the American singer said: “London, I love you so much.
“As you know, London is my final stop on this tour.
“And I just wanted to say I’m going to savour every last second of these last ten shows with you guys. As this is one of my favourite places in the world.”