The specific lyric under question roughly translates to “Forever you’re 25 to me you don’t change BABE 5 x 5 BABE.” When asked whether the lyric refers to a specific person, T.O.P replies, “It’s not like that. We discussed this amongst ourselves and the theme contains the selfish desire for a woman not to age. We thought of how we could express that in an interesting way. We thought about what age people usually consider a woman to be the most beautiful so 25? 26? After contemplating, we decided on 25. There is no big meaning to it.”
To a further question about whether the lyric has nothing to do with Kiko Mizuhara, who was born in 1990 and is 25 years old in Korea, G-Dragon says, “Kiko is 25? (Laughs) The subject of “Bae Bae” was being 25 years old. It was the theme that first came up when we started on the song. While talking in the studio, we thought, although this might offend women, that 25 is the most beautiful age.”
He continues, “As mainstream artists, we thought rather than just limiting it to 25, we should somehow make it about love. We say 25, and this can mean years or 25 days, but we felt we needed to interpret 25 a little more under the theme of love in order for [the song] to be relatable. We put  in the song as an age, but that is just an interesting part [of the song].
T.O.P adds, “Rappers think that lyrics that haven’t come out yet are interesting. There are a lot of things we put in that are just fun without any special philosophical meaning.”