In the social media community, we often talk about authenticity in your online exchanges. I'm a bit of an idealist. I prefer authenticity in every aspect of life, though I don't necessarily demand it (it's a free country after all). One thing that really kills me as a musician, however, is when famous singers lip-sync to their popular hits in public appearances.
Such was the case at this year's (probably every year's) Macy's Thanksgiving Day Parade. Is it too much to ask for these people to sing their freakin song!!??? Don't these musicians have any respect for themselves? I realize it's a long parade, but they could have at least sang during their televised appearance.
My advise is to be authentic. No one is going to care about your contribution to anything if you're not doing it for real.