It's not really crossed between anything... It evolved from hardcore punk and just got faster and more aggressive.
Traditional metal and hardcore punk.
They were a Thrash Metal band (and the only one of the "Big Four" who actually played true Thrash Metal). Nowadays, they play some sort of hybrid mix which tends to wander sometime into nü-"metal" territory.
Nightwish makes and produces a variety of music, from gothic metal, gothic rock, alternative, and more. They tend to mix classical styles of singing with more mordern forms of rock and roll for a unique blend of music.
No, Avenged Sevenfold is by no means what most metal enthusiasts would consider "heavy metal". Personally they're more of a mix between nu-metal and thrash to me. A7X can't hold a candle to true heavy metal bands like Behemoth, Nile, Vader, and Slayer, though.
Jazz fusion is generally a 50-50 mix of jazz and rock styles of music.
People basically got the wierd idea to mix movies with music to make musicals... Usually, they use music just using vocals, like soft music.
hard rock mix with some rock country pieces and glam metal i think.
Mainly trad irish and classical music, but he combined different kinds of irish music with his own compisitions such as slow airs and marches in Mise Eire
They are a heavy metal experimental rock band. Basically a band with a really heavy sound, but they mix various genres. From death metal to soul. But, alternative experimental metal suits them best.
Israel Houghton is a Christian singer. His music is a mix of various styles including rock, jazz and gospel. He is also a worship leader in Houston, Texas.
i don't know but i like to mix music
The band Tiger Army make Psychobilly music which is a mix of punk rock and other styles like blues, garage rock and rockabilly. They have been active since the 1970's.