Todrick Hall's cleverly produced and arranged music videos of songs - from Disney films and classic cinema to pop and Broadway cover tunes - have garnered him a worldwide audience. In this issue's Arts section, Hall suggested the line between online fame and traditional celebrity is blurring. While not every YouTube sensation has a skill set as clearly identifiable as Hall's, vlogging your way to millions of subscribers has to be a talent in and of itself, right?

Todrick Hall's cleverly produced and arranged music videos of songs - from Disney films and classic cinema to pop and Broadway cover tunes - have garnered him a worldwide audience. In this issue's Arts section, Hall suggested the line between online fame and traditional celebrity is blurring. While not every YouTube sensation has a skill set as clearly identifiable as Hall's, vlogging your way to millions of subscribers has to be a talent in and of itself, right?

PewDiePie

If there's a YouTuber you know, it's likely to be PewDiePie, aka Felix Kjellberg, whose channel currently boasts upward of 47 million subscribers. PewDiePie started out making vids of himself reacting (in an over-the-top manner, of course) to his video game play. He branched out into produced comedy and other content and has appeared in episodes of "South Park" and on "The Late Show with Stephen Colbert."

Lilly Singh

This Canadian vlogger's channel, IISuperwomanII, has nearly 10 million subscribers, who are treated to loads of silliness in the form of topical vlogs/comedy bits about her parents, Canadians and, of course, YouTube. She has taken her show on tour and recently had small parts in "Ice Age: Collision Course" and "Bad Moms."

KSI (Olajide Olatunji)

Watch this British dude play FIFA! He yells at the screen and gets excited when the new games arrive! Watch him get 14 million subscribers and branch out into acting, rapping and singing.

Colleen Ballinger

Whether as PsychoSoprano (4.3 million subscribers) or her alter ego Miranda Sings (6.8 million), Ballinger offers music and advice, both often purposefully off-key. Keeping it all in the family, Ballinger's brother, Chris, vlogs his family's day-to-day life as Ballinger Family (644,000) and her husband vlogs and entertains as JoshuaDTV (1.3 million).

Yuya

More than 15 million YouTube subscribers enjoy Mariand Castrejon Castañeda's Spanish-language videos on beauty, food and other helpful topics. Her bright persona is supported by her high-pitched voice. She launched a second channel, Yuyacst (2.5 million subscribers), for more traditional vlogging videos.

Amazing Phil

This young Brit has almost 3.7 million subscribers with whom he shares, well, stuff that happens in his life. Phil Lester's vids are traditional-style vlogs - static close-ups of Phil and his friends, heavily edited and with costumes and sound effects, doing either stream-of-consciousness or set-up comedy bits.

Lizzie Velasquez

After a photo of Velasquez was infamously memed as "The Ugliest Woman in the World," she responded by taking to YouTube, where she now has almost 700,000 subscribers. Mixing an anti-bullying message with standard vlog topics, Velasquez, who has a rare medical condition, is now the subject of a documentary.