I've toured with this app for a few years, It drove most of the show I was involved in. We also had a 14 million dollar booth for a client at CES last year, this app drove that entire show for the duration of CES:
@Zoltan has made and app as well that does this:
If your artist is just using CDJ's then ShowKontrol is another solution.
I'd love to have clips and columns triggered via LTC but there is a LOT more you have to consider when writing this in. (what if you artists cues in past a point of the start point for your LTC trigger, what if there are multiple things mapped to the the same start point [conflicts]). For now, these apps are a good solution to get you working.