All answers contain the word "big"
1. New Orleans
 Big Easy
2. Joni Mitchell hit of 1970, covered more recently by Amy Grant & Counting Crows
 Big yellow taxi
3. New York
 Big Apple
4. US sitcom (2007 to date)
 Big bang theory
5. In the 1962 movie comedy It's a Mad, Mad, Mad, Mad World, where is the treasure buried.
 Under the "Big W", (four palm trees growing in the shape of the letter "W")
6. Four Seasons hit
 Big girls don't cry
7. Sesame Street character
 Big bird
8. 1986 American fantasy martial arts film starring Kurt Russell
 Big Trouble in Little China
9. Enid Blyton character
 Big Ears
10. 1998 American crime comedy directed by the Coen brothers and starring Jeff Bridges
 The Big Lebowski