In the early hours of Wednesday morning, the Canadian singer wrote on Twitter: “Keeping it positive”.
In a grainy video of the alleged incident, which was posted by TMZ, the two stars appear to have an exchange of words at Cipriani restaurant on the Spanish island of Ibiza.
According to reports, other celebrities such as Paris Hilton, Lindsay Lohan and Diddy were also at the A-lister venue partying.
Just hours after the incident, 20-year-old Justin posted a picture of Orlando’s estranged wifeMiranda Kerr in a bikini on his Instagram account – before quickly removing it minutes later.
Justin has in fact met Miranda – the pair were photographed together backstage at the 2012Victoria’s Secret Fashion Show, sparking rumours of a romance.
Keeping it positive
— Justin Bieber (@justinbieber) July 30, 2014
Orlando, meanwhile, was spotted with Justin’s ex-girlfriend Selena Gomez in April this year.
The pair were seen sitting side-by-side on the curb outside Chelsea Handler’s comedy show in Los Angeles – but quickly separated when they were spotted by photographers.
Back in March, the 21-year-old singer and Orlando, 37, both appeared as guests at WE Day, a conference aimed to inspire young people, and the Come and Get It singer shared a photo of them backstage, alongside Seth Rogen.
"#Weday -unbelievable time. So inspired and hopefully encouraged many!!" wrote Selena at the time.
Orlando and Miranda called time on their six-year marriage in October last year, announcing the news through the British actor’s representative.
“In a joint statement, Orlando Bloom and Miranda Kerr have announced that they have been amicably separated for the past few months,” the representative revealed.
“After six years together, they have recently decided to formalise their separation.”
“Despite this being the end of their marriage, they love, support and respect each other as both parents of their son and as family.”
Orlando and 31-year-old Australian model Miranda started dating in 2007. They have a little boy, Flynn, together.