|Kelly Clarkson Season 1 of American Idol|
Additionally, I'm only going to look at American Idol winners, although I would freely say that runner's up in the award show have largely done better at making the celebrity conversion. Perhaps, due to the ability to do so with more flexibility (famous non-winner's excluded here include Clay Aikin, Bo Bice, Kaherine McPhee, Adam Lambert, Jennifer Hudson, Chris Daughtry, Kellie Pickler).
Notable for Idol, compared to The Voice, is that Idol seems to give artist a chance to become celebrities, and the artist release singles and albums quickly to get some quick lift off their win, that seems to really help carry them to success.
Here's the Wikipedia Test: If the winner's wikipedia page is primarily about their careeAmerican Idol, they have a current "fail" status of moving into celebrity status based on their post-win career.
r during before or during
♪ Kelly Clarkson (Season 1 winner, 2002): *SUPER WINNER* Kelly's page is hardly about American Idol at all at this point, most of her page discusses many post-2002 events/successes.
♪♪ Ruben Studdard (Season 2 winner, 2003): *WIN* He followed up his Idol win with a Grammy nomination and has five albums, singles, some weak direct-to-DVD filmography, and now as a contestant on The Biggest Loser.
♪♪♪ Fantasia Barrino (Season 3 winner, 2004): *WIN* Fantasia continues to work the scene, releasing albums and even won a Grammy in 2011 (Best R&B Vocal Performance for "Bittersweet").
♪♪♪♪ Carrie Underwood (Season 4, winner 2005): *SUPER WINNER* Carrie's wikipedia page is not about American Idol - the multi-Grammy winning artist is a huge success, a success in the past 8 years that fills her Wikipedia page. No one cares what song she sang an Everly Brothers song on 60s week or a song from The King & I on Broadway week - this isn't what her page is about.
♪♪♪♪♪ Taylor Hicks (Season 5, winner 2006) *Fail* Even the sections on his Wikipedia page that aren't about American Idol mention American Idol (i.e. a section title post-Idol career). If Idol defines his career still, I'm calling it a fail - although Hicks has had some albums and exposure in the past 7 years.
♪♪♪♪♪♪ Jordin Sparks (Season 6, winner 2007) *Win* Awards, albums, filmography, philanthropy...it's more than Idol.
♪♪♪♪♪♪♪ David Cook (Season 7, winner 2008) *Mixed Bag/Too Close To Call* It's about 50/50 Idol and post-idol. I'm calling this one too close to call.
♪♪♪♪♪♪♪♪ Kris Alan (Season 8, winner 2009) *Mixed Bag/Too Close to Call* Like David Cook, it's about 50/50 Idol and post-idol. I almost called it a fail there's quite a bit of text about his two albums to-date and his philanthropy. Give it a year or two and he might tip to the win category.
♪♪♪♪♪♪♪♪♪ Lee DeWyze (Season 9, winner 2010) *Fail* With non-successful albums it's almost all about Idol, even his award section is his Teen Choice Award win is for Best Reality/Variety Star.
♪♪♪♪♪♪♪♪♪♪ Scotty McCreery (Season 10, winner 2011) *Mixed Bag/Too Close to Call* I think he can tip to the win category. He's working it with his third album out just a month ago, he's getting out their hustling. The star-events haven't really happened yet, so the page is mostly about Idol.
♪♪♪♪♪♪♪♪♪♪♪ Phillip Phillips (Season 11, winner 2012) *Mixed Bag/Too Close to Call* His page is one of the shortest of the bunch (if not the shortest). But since it covers awards, and his song "Home" was very popular, I can't trully call it a fail. We'll see if time allows him the change to tip the scales to the win category.
♪♪♪♪♪♪♪♪♪♪♪♪ Candice Glover (Season 12, winner 2013) *Too Early to Tell* A couple singles, but she's still super fresh off her idol win, let's see what happens.