We previously saw Best Coast perform their cover of Fleetwood Mac classic "Rhiannon" during an exclusive session for SiriusXM. But it appears Bethany Cosentino and her band mates weren't done there. They were the musical guest on Late Night With Jimmy Fallon last night and again slayed their take on the track. The studio version appears on Just Tell Me That You Want Me, a Fleetwood Mac tribute album dropping Aug. 14. Watch the performance above.