While co-hosting the GQ Men of the Year Awards in London, the two singers caused a stir on stage, reports the Daily Mail.
It was clear to the audience that Allen was under the influence of alcohol, as she swigged champagne on stage. Eventually, the 23-year-old star began to slur her words, and Elton John openly questioned her decision to continue drinking, to which Allen responded, "F**k off Elton, I’m 40 years younger than you and have my whole life ahead of me!"
The two continued to share uncomfortable exchanges of words in front of the entire audience.