Finally, after Kesha promised she just wanted to sing a tribute to Dylan, Dr. Luke "allowed" her to perform again. And so she did, with a big standing ovation at the end.
2. Celine Dion's emotional speech
The powerhouse singer belted out Queen's The Show Must Go On before producers presented her with the Icon Award. And who did they enlist to carry out the trophy?
Dion's 15-year-old son, René-Charles, which meant Dion broke down crying on stage. Dion, whose husband and brother both died within days of each other this year after battling cancer, proceeded with a very emotional speech as her son stood next to her. She thanked her late husband, René Angelil, "who I know will continue to watch over me from up above." "René, this one's for you," she said.
3. Ludacris' crack about the Oscars
Ludacris, who co-hosted with Ciara, boasted about the show's prestige. "The Billboard awards is like the Oscars of music," he started. "Except, unlike the Oscars, we actually have black nominees this evening." The audience didn't quite know how to react to that one.
4. Demi Lovato's shirt
The 23-year-old pop star, known for her social activism, sported a T-shirt in support of the transgender community with a sparkly, gender-inclusive bathroom symbol as she performed her hit Cool for the Summer.
5. Nick Jonas being a very supportive brother
Nick played the part of Very Serious Singer as he crooned his solemn duet Close with Tove Lo. But when his big brother Joe's band DNCE performed Cake By the Ocean, Nick had a full-out dance party in the audience.
6. Pink singing from a trapeze
As she tends to do at award shows, Pink defied gravity with some terrifying aerial stunts, courtesy of her new single Just Like Fire.
Reaction from some viewers: Bor-ing!
7. Rihanna's show-stopper
Rihanna didn't need any fancy choreography or back-up performers for Love on the Brain, a ballad that showcased the star's powerful voice as she was surrounded by a set that looked like a haunted cave.
8. Questlove and Madonna's Prince tribute
Before Madonna took the stage, Questlove, drummer for the Roots, gave a touching monologue about Prince, who died almost exactly a month ago. "No matter our race, our colour, our creed, sexual orientation, all of us live in the land of music. And his departure from it was an earthquake," Questlove said. "But his departure leaves behind so much work still to do: We can follow his example, we can be fierce, we can be uncompromising, we can be experimental. We can also listen to all those songs that he left for us."
Cue Madonna sitting on a purple throne, as she belted out Nothing Compares 2 U. Afterwards, Stevie Wonder joined her on stage for a rendition of Purple Rain.
9. Ariana Grande's Dangerous Woman
Grande is hit or miss during awards, but she looked like she was having a blast during her set of Dangerous Woman and new single Into You - and her energy was infectious.
10. The Britney Spears medley
The highly hyped show opening featured Spears going rapid-fire through her multiple hits, from Circus to Toxic to Womanizer. Curiously, there was no sign of ... Baby, One More Time or Oops! ... I Did It Again, the two hits that launched her to pop superstardom back in the day.
