More recently, the star split from her fiance Pete Davidson weeks after the death of her ex-boyfriend and rapper Mac Miller – here's the lowdown…
Who is Ariana Grande? What's her background?
Singer, songwriter, and actress Ariana Grande-Butera, 25, was born in Boca Raton, Florida on June 26, 1993.
She is of Italian descent and her name is believed to be inspired by Princess Oriana from Felix the Cat.
Her parents separated when she was eight years old and she moved to New York with her mother and half-brother Frankie, who was one of the contestants on Celebrity Big Brother in 2016.
Ariana made her Broadway debut in 2008 when she landed the supporting role of cheerleader Charlotte in the musical 13.
Following her stint on Broadway, she landed the role of Cat Valentine in the Nickelodeon show Victorious, a role for which she had to dye her hair red every week.
Ariana stayed on the show until its third and final season and went on to star in a spin-off of Victorious and another Nickelodeon show iCarly, called Sam and Cat, which aired for a year.
When did Ariana start her music career and what are her biggest hits?
Ariana's debut album, Yours Truly, was released in September 2013 and debuted at the top of the US chart.
She's since released three more albums, My Everything (2014), Dangerous Woman (2016) and Sweetener (2018).
Ariana's biggest hits include One Last Time, Into You, Problem, Break Free and Side To Side.
The title track from her forthcoming album Thank U, Next was released on November 3, 2o18.
What happened at Ariana Grande's Manchester concert in May 2017?
On May 22, 2017, a suicide bomber left 22 people dead after an explosion at Ariana's concert at Manchester Arena.
The singer had just left the stage when the terrorist attack happened.
Ariana tweeted her condolences to those who lost their lives and their families.
She said: “Broken from the bottom of my heart, I am so so sorry. I don’t have words.”
Ariana Grande returned to Manchester on Sunday, June 4 to lead a One Love Manchester benefit concert raising funds for the families affected by the terror attack.
As well as Ariana – Take That, Justin Bieber, Coldplay, Niall Horan, Katy Perry, Miley Cyrus, Pharrell Williams and Liam Gallagher took to the stage and raised money for the Red Cross’s Manchester Emergency Fund.
All of the survivors of the bombing were given free tickets to the tribute gig.
There were a number of notable moments, including the dancing policeman, the enthusiastic security guard, Ariana's emotional duet with the Parrs Wood High School choir and the singer's tribute to victim Olivia Campbell.
On July 12, 2017, it was revealed that Ariana had been made an honorary citizen of the city by Manchester City Council.
Does Ariana Grande have a boyfriend?
Ariana was dating rapper Mac Miller but the couple split in May, 2018 after nearly two years of dating.
According to TMZ, the couple decided to split after their work schedules became too busy but they still "love each other dearly" and are determined to stay best friends.
The singer first went public with the 26-year-old rapper, in August 2016 and later confirmed their romance during an interview with Ellen DeGeneres on her chat show.
He sang a duet with Ariana at the One Love Manchester concert.
Mac Miller, whose real name is Malcolm James McCormick, was a self-taught musician and released his fourth album in 2016 called The Divine Family.
Mac died on September 7, 2018, of a suspected overdose.
The singer was forced to disable comments on her Instagram page for a while after trolls attacked her for being at "fault" for his death.
Who's Arina Grande's ex fiancé Pete Davidson?
On May 22, 2018, it was reported that Ariana Grande had moved on from her rapper beau with Pete.
Ariana was a guest host on Pete's show SNL in 2016 but they were both in other relationships at the time.
Pete then confirmed the romance by uploading a picture of the happy twosome dressed up in Harry Potter costumes, captioned: "The chamber of secrets has opened…"
On June 11, 2018, Ariana was seen sporting an enormous diamond ring after reportedly getting engaged to her boyfriend of four weeks Pete.
The singer was seen wearing the sparkler during a performance at iHeartRadio's Wango Tango at the start of the month.
Ariana was spotted wearing her engagement ring again during a shopping trip in New York and friends claim they're planning to get married in November 2018.
A source told ET: "Ariana has talked about marriage since she was 15.
"During her teen years, she was always very dreamy about a wedding and she used to call friends and talk about one day having that one special person."
On June 21, 2018, Pete confirmed the engagement during an interview with Jimmy Fallon.
On October 15, 2018, it was revealed that the two had reportedly split just weeks after the death of her ex-boyfriend and rapper Mac Miller.
According to TMZ, they both admitted it was not the right time for their relationship to take off, but the source added they had not ruled out a reunion in the future.
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