Ariana Grande returned to the United Kingdom to hold a benefit concert for the victims of the Manchester attack that killed 22 civilians, injured over a hundred, and has left trauma to thousands of people from across the pond. Some 50,000 people gathered at the Emirates Old Trafford to stand together against terrorism. Aside from the 23-year-old pop singer, artists including Miley Cyrus, Justin Bieber, Coldplay, Robbie Williams, Black Eyes Peas and more paid tribute to those who fell victims of the cowardly act through "One Love Manchester" concert.

'Where is the love?'

The "Almost is Never Enough" singer shared the stage with the three members of Black Eyed Peas to perform their 2003 hit song.

Will.i.am led the group and dedicated their performance to the people of Manchester and London following a series of terrorism attacks in the two English cities.

But before they could even finish their performance, Ariana became emotional and hugged Will.i.am while trying to hold back her tears. The Black Eyed Peas member, on the other hand, thanked the police authorities and everyone who "came for love."

Aside from the trio, Ariana also performed alongside Miley Cyrus where they sang Crowded House's "Don't Dream It's Over." The "Malibu" singer, during her speech, called for peace in the wake of Manchester and London attacks. Meanwhile, Justin Bieber teared up while playing the acoustic versions of "Love Yourself" and "Cold Water."

'Tonight is all about love'

Ariana and her beau, Mac Miller, heat up the "One Love Manchester" stage with their duet of "The Way" under her "Yours Truly" album released in 2013.

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Earlier reports stated the 25-year-old rapper has stayed beside the pop singer since the tragic incident took place.

But more than their charm onstage, fans were quick to notice Ariana's diamond ring which caused the public to question whether the female singer is already engaged to her boyfriend. The "Dangerous Woman" artist personally confirmed her relationship with Mac during her guest appearance on "The Ellen DeGeneres Show" back in September.

After their performance at the "One Love Manchester," the couple even shared a hug and kiss, making the hearts of the concertgoers flutter. As reported by HollywoodLife.com, sources affiliated with the two revealed Ariana and Mac have been open about settling down. "They talk about marriage all the time with each other, almost to the point where friends are rolling their eyes over it," the insider said.