Musical theater adult Gwyneth Paltrow, who's been letting go as of late, went on Jimmy Fallon last night in a pink onesie to belt out Broadway versions of popular rap songs, including "Started From the Bottom," "Anaconda," and "I Don't Fuck With You." She gave that last one some extra oomph—wonder why?

Last night, Gwyn described her performance as "busting a flow" on Instagram.