Little Mix

Joe Biden and Kamala Harris also marked the occasion.

The pop group became a trio last year when Jesy Nelson left the group.

"Jesy was approached by the group in a very friendly, educational manner."

Panic attacks and a music video shoot all played a part.

Read her exit statement.

From Grimes to Lady Gaga, K-pop to nu-metal...

'I felt that I physically couldn’t tolerate the pain anymore.'

They spilled the tea!

Perrie got candid about mental health.

From Nina Nesbitt’s ‘Loyal to Me’ to Ariana Grande’s ‘thank u, next,’ check out PopCrush’s picks for the best music videos of 2018.