Describing this particular style is rather difficult, more so it is rather a compilation of different trends or as others call an eclectic type of fashion. I love the comfortability appearance of the outfit and how absolutely fabulous he looks wearing it. Everything about the haircut and glasses scream Gaga to me, however, on a more classical end... the over sized sunglasses call a more Jackie O. look. From the black sweater vest over a casual grey t-shirt and distressed jeans topped off with tennis shoes you would think it almost falls under the Grunge trend, which was most fashionable in the 80's- early 90's. I would rather look at it as the new 2000's look a hint of grunge with a blend of a retro feel. Below is a perfect example of a "retro" 

 from the skinny jeans, to the off shoulder loose shirt.  I would classify this trend for follow the Trickle Up Theory due to its street fashion appearance. In my opinion I would categorize this trend to be in its peak simply because several stores like Top Shop, Mexx, Guess etc...still carry these very items. Teenagers and even people in their mid 20's are the type of consumers who would normally wear this. I often see these kinds of outfits at the club more than on the street now-a-days. 

After hours of stalking, scouting, & asking people to take a photo for my blog I finally got one to agree! 

Her outfit comes from a few different inspirations. First, lets take her pants also known as "harem pants" for example, the biggest icon I can remember to introduce this pant style was MC HAMMER, for those who are not familiar...

<---- That strapping (not so young) lad ladies & gents is Mr. Hammer himself sporting the baggy long pants which are tapered at the ankles with over sized/saggy pockets aka harem pants. This icon became popular in the 1980's, however, his style hit mainstream after his debut song "Can't Touch This" in 1988.
Aside from the fact that MC HAMMER happens to be flashing a fashion tragedy with his harem pants and bright yellow Sgt. Pepper-like jacket I would pick her (woman above) interpretation any day.

I would consider this particular trend to follow under the trickle down theory, due to the fact that this style was introduced by a celebrity. If you ask my opinion, I would place the harem pants at the peak of the trend cycle chart. Stores like H&M, Halston, and BEBE began designing their interpretation of these pants either in cotton, silk, or jersey material. Typically, I see either young teens or individuals in their mid twenties as the largest consumers of this style.