Kelly Clarkson marks 14 years since American Idol win

Kelly Clarkson will be "forever grateful" to American Idol for opening so many doors for her.

The singer was crowned the first ever champion of American Idol back in 2002 when she beat runner-up Justin Guarini in the finale.

Sunday (04Sep16) marked 14 years since that historic day, and Kelly took to her Twitter page to express her gratitude.

"14 yrs (sic) ago 2day @AmericanIdol opened a door w/such amazing opportunities & experiences 4 me!" she wrote. "I am 4ever (sic) grateful & blessed! #heresto14more."

Since winning Idol, Kelly has sold 25 million albums and 36 million singles globally and has had more than 100 number one hits (counting all national, domestic music charts current, recurrent and catalog) on the Billboard Hot 100 chart, with A Moment Like This, My Life Would Suck Without You and Stronger (What Doesn't Kill You) among fan favourites.

She has also taken home three Grammy awards and released her seventh studio album Piece by Piece last year (15). These accolades have made her the most successful American Idol contestant to date.

Kelly's personal life has also changed dramatically in the last 14 years. She is now a mother of two young children with husband Brandon Blackstock - two-year-old River and four-month-old Remington - as well as being stepmother to his two children from a previous relationship.

Further offspring are unlikely though, as Kelly revealed during an interview back in March (16) that being a family of six was more than enough.

"Oh, no, we are done," the pop star told Australia's KIIS FM radio station. "Oh good Lord, yes, I can't be pregnant again. This will be our number four total, so we're good... Honestly, the first one was really rough, and I was like, 'Oh, it can't happen again,' and no, it happened, like, way worse this time."

Kelly previously revealed she suffered from hyperemesis gravidarum, a condition which results in severe nausea, vomiting, weight loss and dehydration.