Here's another that was just released, "United Together" by Heather Small. Oddly, it doesn't have many lyrics which is a shame because Heather Small has a beautiful voice.
"Together Alone" by Peter Wilson
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"Hot Together" by The Pointer Sisters
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"I Think We'd Feel Good Together" by Rob Thomas
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"Stronger Together" by Sybil
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"Let's Get Together Tonite" by Steve Walsh
Together Forever - Rick Astley (US Hot 100 #1, UK #2, 1988)
Happy Together - Jason Donovan (Turtles cover; UK #10, 1991)
We'll Be Together - Sting (US #7, 1987)