Mariah Carey, Lauren Huichan and Nick Cannon

Mariah Carey, Rosario Dawson, Wyclef Jean and Ashton Kutcher are participating in the second annual TeenNick Halo Awards, the network told TVGuide.com.

The show will recognize four teens for their philanthropic leadership in their respective communities. Each honoree recently was treated to a surprise visit from host and executive producer Nick Cannon and will receive a grant from the Entertainment Industry Foundation.

The winners and matched celebs:

Herold Charles, 18, of Miami, moved from Haiti five years ago, and after last year's devastating earthquake, he dedicated his time to help 25 families in the U.S. locate their loved ones. His match: Jean, who provides scholarships to Haitian children through his Yéle Haiti Foundation.

Joshua Hall, 17, of New York, became an advocate to eradicate child slavery. He's been paired with Kutcher, who started the DNA Foundation to raise awareness about child sex slavery.

Jordan Somer, 16, of Papillion, Neb., created Miss Amazing, a pageant for girls and women aged 5 to 35 with physical and mental disabilities. Her match: Dawson, who's as a board member of V-Day, a global activist movement to stop violence against women and girls. 

Lauren Huichan, 18, of Albuquerque, N.M., who was a troubled foster kid for years before getting her life together. She's now the president of the youth advocate group Adelante and works with the New Mexico foster care system. She's been paired with Carey, who works with the Fresh Air Fund, which helps disadvantaged urban youth.

The 2010 Halo Awards air Friday, Dec. 10 at 8/7c, on TeenNick.