Lady Gaga isn't the only celebrity to make a major contribution towards Hurricane Sandy relief efforts.
Justin Bieber and Rihanna are also stepping up with major donations that will go directly towards hurricane victims in NYC and New Jersey. Justin is teaming up with charity Pencils of Promise to donate a dollar to relief efforts for every ticket sold at his two shows in Madison Square Garden, show in New Jersey and show in Brooklyn. Since all four concerts already sold out, that means he'll be writing a check for $79,000! "We decided that for the Jersey, Brooklyn, and 2 MSG shows every ticket sold a dollar will be donated to Hurricane Sandy Relief #GIVEBACK." he tweeted. "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."
What is Rihanna doing to help out? Find out after the jump!

























