It's one thing to see an amazing work of art in its finished form, but it's even cooler to watch the full process. In a video that's gone viral on Facebook, this artist creates a thread portrait of Justin Timberlake [1] using 13,000 nails. Watch the incredible clip above, then check out more viral videos [2], including JT's hilarious #NoLimesNeeded tequila commercial [3] and one girl's seriously impressive Taylor Swift lip-sync mashup [4].