Things are about to get much more complex at Complex Media Network, as the lifestyle portal targeted toward 20-something men invited 20-something (21, to be exact) sites to join its ad network, which already consisted of 26 sites delivering 184 million monthly page views and 15 million unique monthly visitors.

Style-related addition to Complex Media Network are: Por Homme, an online men’s fashion, footwear, culture, and lifestyle magazine; UpscaleHype, a high-end online lifestyle magazine; video based lifestyle blog Maestro Knows; Selectism, a daily online men’s fashion, footwear, lifestyle, and culture magazine and news site focused on street fashion; online action-sports lifestyle and culture magazine and news site Radcollector; and Highsnobette, a lifestyle magazine devoted to outside-the-box fashion, art, and lifestyle trends.

The music sector brought the following five sites to Complex Media Network: Pigeons and Planes (new music in mainstream hip-hop, indie rock, or anything in between); YouHeardThatNew (exclusive tracks, interviews, and videos from urban artists); 2dopeboyz (MP3s and blog tracks, covering live shows, current artists, album reviews, tour dates, and news); HipHopDx (news, songs, video, and mixtapes, updated daily); and Consequence of Sound (New York- and Chicago-based online music publication devoted to the worldwide music scene).

Two art sites made the cut: Checkoutmyink, for tattoo enthusiasts; and daily online news site for the arts/culture world Curated Magazine. Complex Media Network also welcomed a pair of sites from the gaming and technology sector: Platinum Life, a game with the object of becoming a hip-hop legend; and PlayStation 3- and PlayStation Portable-targeted PlayStation University.

The entertainment category brought independent film site Get the Big Picture; and CelebritySchoolPics.com, which features the world’s largest collection of celebrities before they were famous. And the last four additions to Complex Media Network were from the sports world: Dime Magazine (basketball); Bounce (basketball); Total Pro Sports (daily sports news and unseen sports videos, player news, fantasy sports tips, and betting advice); and HighSchoolHoop (Dime’s site covering high-school basketball).

CEO Rich Antoniello said:

The 21 sites joining Complex Media Network are highly respected and well-trafficked. As a result, I am confident that they will build upon the deeply sustained conversation we’ve already established with one of the most hard-to-reach demographics.