HOLLYWOOD, California (CNN) -- Singer Christina Aguilera joins fellow Grammy Award winners Alicia Keys and John Legend for "CNN Heroes: An All-Star Tribute," airing Thanksgiving night on CNN.

Christina Aguilera performed her hit single "Beautiful" at "CNN Heroes: An All-Star Tribute."

The show, taped before an audience of more than 2,000 at the Kodak Theatre in Hollywood, pays tribute to the top 10 CNN Heroes of 2008.

Liz McCartney, dedicated to helping survivors of Hurricane Katrina rebuild their homes, has been named the 2008 CNN Hero of the Year.

McCartney, of St. Bernard Parish, Louisiana, received the honor at Saturday night's taping of "CNN Heroes: An All-Star Tribute." The telecast airs at 9 p.m. ET/PT on Thanksgiving on the global networks of CNN.

McCartney, who will receive $100,000 to continue her work just outside New Orleans, was selected from among the top 10 CNN Heroes after six weeks of online voting at CNN.com. More than 1 million votes were cast.

"To the country and the world, I ask you to please join us," McCartney said. "Together we can continue to rebuild families' homes and lives. ... If you join us, we'll be unstoppable."

Hosted by CNN's Anderson Cooper, "CNN Heroes: An All-Star Tribute" features moving musical performances by Aguilera, Keys and Legend. Watch a preview of the show, including Aguilera's performance "

Aguilera performed her hit single "Beautiful." Legend, backed by the world-renowned Agape Choir, brought the audience of more than 2,000 to their feet with his powerful call to personal action, "If You're Out There," from his just-released album, "Evolver." Keys sang "Superwoman," her tribute to women around the world, from her hit album "As I Am." What are the answers to this following set of questions: 1. What is a hit of Christina Aguilera?
2. Where did she perform it?
3. What was the tribute for?
4. Who was one of the heroes?
5. What did she do?
6. "
7. Where is McCartney from?
8. Where is she working?
9. Was she given money to continue?
10. How much?
11. How many people voted for her?
12. How long was the voting period?
13. Who backed Aguilera during the show?
14. How many people were watching?
15. What did Keys sing?
16. What album is that from?
17. Was the song a tribute to something?
18. When did the show air?
19. Who is it hosted by?
20. What album is If You're Out There from?
Answer: 1. Beautiful
2. CNN Heroes: An All-Star Tribute
3. pays tribute to the top 10 CNN Heroes of 2008
4. Liz McCartney
5. dedicated to helping survivors of Hurricane Katrina rebuild their homes
6. Singer Christina Aguilera joins fellow Grammy Award winners Alicia Keys and John Legend for "CNN Heroes: An All-Star Tribute," airing Thanksgiving night on CNN.
7. St. Bernard Parish
8. New Orleans
9. Yes
10. $100,000
11. More than 1 million votes were cast
12. six weeks
13. Agape Choir
14. 2,000
15. Superwoman
16. As I Am
17. to women around the world
18. Thanksgiving night
19. Anderson Cooper
20. Evolver

Yemen, officially known as the Republic of Yemen, is an Arab country in Western Asia at the southern end of the Arabian Peninsula. Yemen is the second-largest country in the peninsula, occupying 527,970km (203,850sqmi). The coastline stretches for about 2,000km (1,200mi). It is bordered by Saudi Arabia to the north, the Red Sea to the west, the Gulf of Aden and Arabian Sea to the south, and Oman to the east-northeast. Although Yemen's constitutionally stated capital is the city of Sana'a, the city has been under rebel control since February 2015. Because of this, Yemen's capital has been temporarily relocated to the port city of Aden, on the southern coast. Yemen's territory includes more than 200 islands; the largest of these is Socotra.

Yemen was the home of the Sabaeans (biblical Sheba), a trading state that flourished for over a thousand years and also included parts of modern-day Ethiopia and Eritrea. In 275 AD, the region came under the rule of the later Jewish-influenced Himyarite Kingdom. Christianity arrived in the fourth century, whereas Judaism and local paganism were already established. Islam spread quickly in the seventh century and Yemenite troops were crucial in the expansion of the early Islamic conquests. Administration of Yemen has long been notoriously difficult. Several dynasties emerged from the ninth to 16th centuries, the Rasulid dynasty being the strongest and most prosperous. The country was divided between the Ottoman and British empires in the early twentieth century. The Zaydi Mutawakkilite Kingdom of Yemen was established after World War I in North Yemen before the creation of the Yemen Arab Republic in 1962. South Yemen remained a British protectorate known as the Aden Protectorate until 1967 when it became an independent state and later, a Marxist state. The two Yemeni states united to form the modern republic of Yemen in 1990. What are the answers to this following set of questions: 1. Is Yemen the full name of the country?
2. What is the proper name?
3. Which two countries united to form Yemen as it is today?
4. How long is Yemen's coastline?
5. How many countries does Yemen border?
6. How many bodies of water does Yemen border?
7. Does its territory include any islands?
8. What is the largest island?
9. When was the region now known as Yemen first under Jewish control?
10. What was the kingdom called?
11. When did Christianity come into the region?
12. What about Islam?
13. Were any dynasties ever in control of Yemen?
14. Which was the strongest?
15. Which kingdom was established after World War I?
16. How long was it in power?
17. When did the Zaydi Mutawakkilite Kingdom change in power?
18. What was established then?
19. When was the modern republic of Yemen formed?
20. Was South Yemen previously under British control?
Answer:
1. No
2. Republic of Yemen
3. Ethiopia and Eritrea
4. about 2,000km (1,200mi)
5. Two
6. Three
7. Yes
8. Socotra
9. 275 AD
10. Himyarite Kingdom
11. 4th century
12. 7th century
13. Yes
14. the Rasulid dynast
15. The Zaydi Mutawakkilite Kingdom
16. unknown
17. in 1962
18. Yemen Arab Republic
19. 1990
20. Yes