is not letting a pandemic hamper her beauty routine. On Thursday, the Lose You To Love Me singer made a post to her Instagram account to promote a video showing her foundation routine, which was posted to Rare Beauty’s YouTube channel on Tuesday.   The siren went from makeup-free to fully glammed with hot pink lips.  An inside look: Selena Gomez posted a tutorial video to her cosmetic company Rare Beauty’s YouTube channel on Tuesday Gomez begins the video by opining that…