"Can't B Good" is a song recorded by American singer Janet Jackson for her tenth studio album Discipline (2008).

[4] Princess P. from MWZA described the lyrics as "standard falling-in-love-too-deep far", with the thwack of the snare contrasting heavily with the layers of cooing vocals.

[5] Musically, the song is a mid-tempo[6] "smooth and jazzy" R&B ballad,[7][8] featuring thundering bass and piano,[9] with 1980s-inspired keyboard sounds and cooing harmonies.

Andy Kellman from AllMusic picked the song as one of the album's best tracks, highlighting that "it's a descendent of her brother Michael's 'Can't Help It,' with that gentle and affecting self-examination that only a Jackson can do so well.

"[1] Chuck Taylor of Billboard magazine wrote that "'Can't B Good' serves up a smooth, jazzy groove and Jackson's soft, supple vocal, fluffed with multiple background layers that duly merit adult R&B love.

"[5] The Boston Globe writer Joan Anderman perceived the song is "eerily reminiscent of 'Human Nature', one of brother Michael's most elegant records.

"[17] For Nick Levine from Digital Spy, the song was created to recall classic Jackson ballads like "Come Back to Me" (1990) and "Let's Wait Awhile" (1987), but failed to do so, due to its lack of melody.