The surprise visit was shared on TikTok and confirmed by Abby Hagstrom, a public relations account director at Havas Formula.

LIVERMORE, Calif. -- Some Costco shoppers in the East Bay got a big surprise earlier this week -- former First Lady Michelle ...

Michelle Obama promoted her health beverage line, Plezi Fizz, at a Livermore Costco, generating buzz on social media.

Even former first ladies stop at Costco every now and then, but this wasn't a casual shopping trip. Here's what Michelle ...

Former first lady Michelle Obama was at a Costco in Livermore, California, Tuesday promoting her new line of youth-friendly ...

Most Costco shoppers probably don't expect to spot a former first lady inside the big-box retailer, but some California ...