Rihanna might have a billionaire price tag attached to her name … but she’s still clocking in for regular-degular grocery runs just like the rest of us!

Check the video … RiRi rolled into an L.A. supermarket Monday dressed head-to-toe in black, yet somehow still impossible to miss. Case in point … an elderly shopper behind her was so mesmerized she accidentally grabbed Rihanna’s cart, thinking it was her own!!

Rihanna shared a giggle with the woman over the incident … proving she had no chip on her shoulder, especially since her priority at that moment was shopping for potatoes.