Why is Google voice search randomly opening and playing music on my G3?

I've been having this problem for a while and it's making me absolutely miserable. Whenever I'm listening to music, Google voice search will turn on randomly and switch the song. When I'm watching videos, Google voice search will randomly turn on and play music. Sometimes it will say, "If you just said something, I didn't hear what it was". It's interfering with me using my phone and it's annoying. Is this a virus? What do I do to get rid of it?

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