Michelle Goes Grocery Shopping With Tim Geithner And Tom Vilsack (PHOTOS, POLL)

Shoppers at a Fresh Grocer in North Philadelphia were greeted Friday afternoon by some surprise visitors -- First Lady Michelle Obama, along with Treasury Secretary Tim Geithner and USDA Secretary Tom Vilsack.

The first lady was in Philadelphia to highlight her childhood obesity awareness campaign, called "Let's Move," and to praise steps that Philadelphia has taken to bring healthy, inexpensive food to its neighborhoods. The $15 million Fresh Grocer opened last December in a high-poverty neighborhood in North Philadelphia with help from the Pennsylvania Fresh Food Financing Initiative, which seeks to increase supermarket access to lower-income communities across Pennsylvania through public-private partnerships. Eighty grocery stores have been built since 2004 as part of the initiative, and the president has allotted $400 million from the 2011 federal budget for a national initiative based on the Pennsylvania model.

Angelee Harvey from North Philadelphia was in awe: "It's amazing. You never know what you're going to wake up to. I went into here to buy some juice, and met the First Lady."

See photos of the first lady's visit: