Celebrities are slinging their own lines of skivvies, which raises the question: Is underwear the new tequila? By James Hibberd Writer-at-Large When Justin Bieber moodily slouched into the spotlight ...

After keeping fans waiting for his long-awaited return to the big stage, Justin Bieber finally performed live on the Grammy Awards stage and did so in his underwear. Ending his four-year hiatus from ...