Actress Jenna Fisher
Well known for her role as Pam Halpert on The Office (US) TV series.
https://en.wikipedia.org/wiki/Jenna_Fischer
This scene from gif is specifically from the comedy film Walk Hard: The Dewey Cox Story, a comedy about a fictional rock star and his escapades with Rock n Roll, sex, drugs, and all that's common to those types of musicians, all rolled into one character.
https://en.wikipedia.org/wiki/Walk_Hard:_The_Dewey_Cox_Story