637: Always and Forever

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637: Always and Forever
Studio album by Crystal Kay
Released	August 22, 2001
Recorded	2001
Genre	J-pop, R&B
Length	48:22
Label	Epic
Crystal Kay chronology
C.L.L Crystal Lover Light (2000) 637: Always and Forever (2001) Almost Seventeen (2002)
Singles from 637: Always and Forever
"Lost Child (with Shinichi Osawa and Hiroshi Fujiwara)" Released: February 15, 2001 "Girl's Night" Released: May 9, 2001 "Ex-Boyfriend (feat. Verbal (M-Flo)" Released: July 4, 2001

637: Always and Forever is the second album by Japanese singer and actress Crystal Kay.^{[citation needed]} It is her first R&B record; After the release of her debut album C.L.L Crystal Lover Light, Crystal started to move towards her new sound and made the transition with the single "Girl's Night". The album 637 features songs produced by well-known Japanese urban musicians Verbal, T-Kura, and Michico.

The album reached #19 on the weekly Oricon chart, and continued to rank for eight weeks. In all selling a total of 48,550 copies.