(From the top) BTS, Seventeen and Monsta X
(From the top) BTS, Seventeen and Monsta X Twitter

Several Korean idol groups led by BTS are the most talked about celebrities on Twitter for the year 2017 as K-pop became a hot topic on the social networking site.

Seven-member BTS, backed by their thousands of fans called ARMYs around the world, became the most tweeted about celebrity globally this year, according to Twitter's year-end summary.

Seventeen, another Korean boy band, grabbed second place while Monsta X surprisingly made it by placing at No. 9.

The most tweeted celebrities this year are:

1. BTS

2. Seventeen

3. Camila Cabello

4. Justin Bieber

5. Maine Mendoza

6. Niall Horan

7. Harry Styles

8. Ethan Dolan

9. Monsta X

10. Grayson Dolan

In the US, BTS dominated Twitter as they became the most tweeted about musician for 2017, edging out the likes of Nicki Minaj and Justin Bieber.

Here's the list:

1. BTS

2. Nicki Minaj

3. Harry Styles

4. Chance the Rapper

5. Niall Horan

6. Fifth Harmony

7. Justin Bieber

8. Shawn Mendes

9. Rihanna

10. Ariana Grande

Remember the "Ko Ko Bop" challenge spawned by Korean boy band EXO's song? It became viral and perhaps, helped the song to garner the most mentions on Twitter this year.

"Ko Ko Bop" topped the list while GOT7's "You Are" and "Never Ever" grabbed third and eight places, respectively. There's dispute about the No. 7 hashtag #love_yourself as Billboard reported that it belongs to Justin Bieber while BTS fans said it belongs to the boy band.

According to Billboard, the songs that garnered the most mentions on Twitter this year are:

1. Ko Ko Bop - EXO

2. Hey Ma - Pitbull & J Balvin featuring Camila Cabello

3. You Are - GOT7

4. Work From Home - Fifth Harmony

5. Reggaeton Lento - CNCO

6. Hey DJ - CNCO & Yandel

7. Love Yourself - Justin Bieber

8. Never Ever - GOT7

9. Exs and Ohs - Elle King

10. PILLOWTALK - Zayn

In Korea, BTS dominated Twitter as they are now the account with the most followers at 10.8 million as of press time.

BTS also set this year's "golden tweet" or most tweeted post last July 10 when a video of a sleeping Jungkook being fed with French fry got 770,000 likes and 370,000 retweets.