Stevens, that's actually a Van Dyke facial hairstyle which basically covers a mustache across the upper lip and then goes down in "pipes" (similar to a Horseshoe mustache
) to then meet the wide chin puff or goatee. The thing is that Steven Tyler doesn't have much facial hair in the chin and below the lower lip so it's barely visible depending on the pictures.
I actually didn't see this year's Grammy awards (2014) but I'm going to dig up some information on the styles of the male stars to see a pattern. Apparently, Jared Leto turned up again with long hair after his long hair man bun
appearance at the Golden Globe Awards. In fact Tyler and Leto shared the same long hairstyle and similarly shaped facial hair LOL (pics below).
Here are some more pictures of Steven Tyler Van Dyke style
And this is Tyler and Leto both showing a similar fashion sense!
And this is Jared Leto with an unkempt beard btu because he also has little facial hair it actually looks like a quasi Va Dyke: