Is Beyoncé the new Britney? No, she hasn't shaved her head. The bootylicious singer went barefoot while shopping at New York's posh Bergdorf Goodman store on Sunday. "She was shopping for shorts with two guys," a confused spy tells Page Six. "I don't know why she didn't have shoes on. She wasn't shopping for shoes." Katherine Heigl, however, got the thumbs up -- she was at Bergdorf at the same time as B, wearing footwear and "looking gorgeous." Whoa -- shoes are all we need to make us look like Izzie? Suh-weet!