Current Events > What's the difference between lip syncing and singing with a backing track?

(+) Yeah! (+)

I just heard someone defend Selena Gomez at the amas last night by saying she was not lip-syncing but singing with a backing track, which is why her lips didn't mirror the words. What is the difference?
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isn't it used to add music that wouldn't be practical in a show, like church bells or an organ?
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Live bands would be awesome. Might need an orchestra tho.
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But if the vocals are part of the backing track...
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I might be wrong but I feel like there are things you can pull off in a recording studio (like echo'd lyrics or your own backup vocals) that you can't physically do live.
But... yeah I'm kind of curious, sounds like she was ultimately just lip synching.
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