"Be My Baby" is a song recorded by K-pop girl group Wonder Girls for second studio album Wonder World. "Be My Baby" topped the Gaon Digital Chart and became one of the best-performing singles of 2011.
On November 7, 2011, both the music video for "Be My Baby" and their second studio album Wonder World were released.
"Be My Baby" was written and composed by JYP Entertainment founder Park Jin-young. The song is described as reinterpreting soul music with a modern uptempo.
The song is composed in the key C-sharp major and has 165 beats per minute and a running time of 3 minutes and 31 seconds.
On November 11, 2011, Wonder Girls held their first comeback stage for the song on KBS's Music Bank, the start of their month-long promotions for the song.