Justin Bieber used his VMA acceptance speech to give a huge shoutout to his buddy, Conor McGregor ... saying the UFC superstar will be back better than ever after his devastating leg injury.
33-year-old Conor was at the 2021 MTV Video Music Awards to present the "Artist of the Year" award Sunday night ... rocking a bright, pink suit, his walking cane and a massive smile.
While McGregor got into an intense scuffle with Machine Gun Kelly before his appearance, he was all calmed down once it was time for him to announce the category's big winner.