Adam Lambert: Donate 'What You Can' to Haiti

Adam Lambert tweeted, urging people to give to UNICEF. "Please, everyone donate even the smallest of what you can," he wrote. "We are so fortunate. Let us give where truly needed."

Actress Olivia Wilde wrote on her Twitter page, "Thank you for your donation, of any amount, they are all crucial. Our colleagues in Haiti are sending you their love."

The 7.0 earthquake that shook Haiti yesterday has affected millions of the country's inhabitants -- and from Hollywood to the UN, there are calls for support.

Wyclef Jean issued a statement following the crash, urging people to donate to the Yele Haiti Earthquake Fund to support the victims. Jean's celebrity friends took to Twitter to help spread his message.

"Anyone that may be listening's attention. Call 1884074747 State Dept for Haitian Relief Please help them...I know I will as much as I can," Lindsay Lohan wrote on her Twitter page. "Yele Haiti now for the disaster. Please do all that you can."

Ben Stiller also tweeted his support, writing, "People in Haiti need our help and attention right now."

Diddy tweeted, "God Bless Haiti!!!! God please!!!"

Former President Bill Clinton, a U.N. special envoy for Haiti, said in a statement: "My thoughts and prayers are with the people of Haiti. My U.N. office and the rest of the U.N. system are monitoring the situation, and we are committed to do whatever we can to assist the people of Haiti in their relief, rebuilding and recovery efforts."

The extent of the damage near Port-au-Prince is still unknown, and President Obama has pledged aid to the victims from the United States, saying, "There is no doubt that we are facing a major humanitarian emergency and that a major relief effort will be required."

Today, U.N. spokeswoman Elisabeth Byrs says the situation worsened in Haiti when the agency was notified that the main prison in Port-au-Prince collapsed, and that inmates have escaped.

For more on how you can help send relief to Haiti, check out Wyclef's Yele foundation at www.yele.org. (Due to a high volume of traffic, the page has been periodically down since Wednesday morning.)

See other stars giving back below: