That ballad showcases Adele on vocals and Dan Wilson on piano. Mars sings and plays piano on "Man," which is the first ballad since "Someone" to command the Hot 100.
Locked out of heaven is nearing 4M and when I was your man is coming for 3M, the album is still in the top 10, and his fifth #1 on BB100, so happy for him, wait for the release of treasure & Natalie, they are going to be major.