Britney Spears is featured twice in the countdown: Britney Spears Feat. Pharrell Williams: Boys (2002) and Britney Spears: Toxic (2004).
Pink is featured twice in the countdown: Christina Aguilera Feat. Lil Kim, Mya & P!Nk: Lady Marmalade (2001) and P!Nk: Get the Party Started (2001).
Missy Elliott is featured twice in the countdown: Missy Elliott: Get Ur Freak On (2001) and Christina Aguilera Feat. Lil Kim, Mya & P!Nk: Lady Marmalade (2001) as guest starring.
Christina Aguilera is featured twice in the countdown: Christina Aguilera Feat. Lil Kim, Mya & P!Nk: Lady Marmalade (2001) and Christina Aguilera Feat. Redman: Dirrty (2002).
The Top 40 hasn't host to introduce the music videos, and it hasn't opening or ending credits. It only broadcasts the music videos in countdown without pause or commercials but a brief channel ident promo each 20-30 minutes. In addition, it shows titles (solo singer/music band, song name and album name) at the start and ending of each one, and its number in the countdown.