Nick Jonas responded to Kevin and Joe's pre-GRAMMY "teeth check"

WATCH: Nick Jonas Calls Out Brothers, Joe & Kevin, For Not Checking His Teeth For Spinach

The Jonas Brothers play 'Finish The Lyric'

WATCH: The Jonas Brothers Cover Shawn Mendes & Miley Cyrus In 'Finish The Lyric'

The Jonas Brothers called their split "important"

The Jonas Brothers Stated Their Break-Up Was "Important"

Jonas Brothers regret writing 'Pizza Girl'

WATCH: The Jonas Brothers Regretted Writing And Releasing 'Pizza Girl'

Miley Cyrus quizzed the Jonas Brothers on their purity rings

WATCH: Miley Cyrus Quizzes The Jonas Brothers About Their Purity Rings