This Is My Opinion:
Bye Bye Is Not A Strong Single Choice. However, Planned Properly, I Could Still Have Been A Success. For Instance, They Released Bye BYe Whilst Touch My Body Was Still In The Top Ten Of The Billboard Hot 100. Also They Released Bye Bye to US Radio And Digital Retailers At The Same Time, Which is unusual, as most singles in the US receive at least a months worth of airplay befor being released as downloads, in order to help chart positions. To sum up, although Bye Bye was not an out-of-this-world success, and although it was not a brilliant single choice it could have achieved at least Top 10 status if the release was handled more carefully. In my opinion, if they wanted to score Mariah's 19th US number-one single, Migrate should have been released. It has that Hip-Hop vibe that the US is feeling at the moment, plus T-Pain makes an appearance on the song, and he is extremely popular in the US