1. Who did Mariah duet with in the song 'Endless Love'? Luther Vandross Brian Littrell Lionel Ritchie Ricky Martin

2. Which band sung with Mariah in the song 'Thank God I Found You'? Backstreet Boys 98 Degrees Westlife N'Sync

3. Which rapper features in a remix of Mariah's hit 'Fantasy'? Puff Daddy Eminem O.D.B. Snoop Dogg

4. Who duetted with Mariah in the song 'I'll Be There'? Madonna Trey Lorenz Whitney Houston Celine Dion

5. Which group sang with Mariah in the song 'Against All Odds'? Boyz II Men Westlife 98 Degrees Backstreet Boys

6. Who sang with Mariah in the song 'Whenever You Call'? Brian McKnight Brian Littrell Bryan McFadden Bryan Adams

7. Who joined up with Mariah to sing the hit 'When You Believe'? Faith Hill Christina Aguilera Jessica Simpson Whitney Houston

8. Which other artist features in Mariah's song 'Sweetheart'? JD Puff Daddy Eminem Dr. Dre

9. Which band sang with Mariah in 'One Sweet Day'? Boyz II Men N'Sync Boyzone Bon Jovi

10. How many of the above songs are on Mariah's album 'Number 1's'? Answer: (Word or Number)