The "Beauty and A Beat" singer is making a difference by donating a dollar from each ticket sold from four of his East Coast concerts. "We decided that for the Jersey, Brooklyn, and 2 MSG shows every ticket sold a dollar will be donated to Hurricane Sandy Relief," he tweeted, adding, "and all 4 shows are SOLD OUT so U are all helping us make a difference in the lives of those that need it right now. thanks. #GIVEBACK."