Music 90s

During Boston's 1995 "Livin' For You" tour, who helped Brad Delp sing the high notes?

More Questions from Music 90s
What decade is the hit single "If I Ever Lose My Faith In You" by Sting from?
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What oddly named group had a one time hit "Too Shy"?
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Ace Of Base had which hit single in 1996?
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Who sang the songs "No Scrubs" and "Unpretty"?
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Artist Ricky Martin came out with which of these tracks in the late 90's?
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Go West had which hit single in 1993?
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What is the first word in the song, "Smells Like Teen Spirit", by Nirvana?
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According to his 1990 #1 hit, Garth Brooks has friends in what kinds of places?
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