| バイバイ" "Baibai" / "Bye Bye | |
| Cover: | Byebyeai.jpg |
| Type: | single |
| Artist: | Ai Otsuka |
| Album: | Love Letter |
| Recorded: | 2009 |
| Genre: | J-Pop |
| Label: | Avex Trax |
| Prev Title: | Kurage, Nagareboshi |
| Prev Year: | 2008 |
| Next Title: | Zokkondition/Lucky Star |
| Next Year: | 2010 |
"Bye Bye" (バイバイ) is the 19th single from Japanese singer Ai Otsuka, and the fourth single to be released from her Love Letter album. It is her second re-cut single, and it will be the CM song for the Asahi Breweries LTD new low-alcohol beverage, Asahi Slat.[1]