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Get that girl some Miles Davis, Frank Sinatra, Foo Fighters, Dream Theater, Audioslave, Piano Guys, Pentatonix, Yo-Yo Ma, Carlos Santana, Tiesto, AC/DC, etc. Sample widely across genres. Have fun!
I wouldn't say music particularly matters either, at least not till kids are older. Among older (maybe 4th/5th grade, middle school, etc) kids, there is actually a subset of kids to whom Piano Guys are very much a thing. No one would listen to the classical music station or anything, but definitely a step up from Lady Gaga-type.