One Direction star Niall Horan.Wallko

During his eventful year the 20-year-old singer generated the most posts of any musician on Twitter.

Justin beat One Direction star Niall Horan to the top spot but he finished higher than his bandmates Harry Styles, Liam Payne and Louis Tomlinson who came third, fourth and ninth respectively.

Fifth 1D member Zayn Malik didn't generate enough online interest to make the top 10.

The report was compiled by Twitter and other entrants include Ariana Grande in fifth spot, Demi Lovato in sixth place and Taylor Swift in tenth.

As well as revealing the most tweeted about musician, the statistics also revealed other notable achievements of pop stars on Twitter.

Katy Perry gained more followers than any other artist in 2014, attracting 13 million users to her feed bringing her total to 60 million. Justin got a very respectable 11 million more followers; Taylor added 10 million to her profile, while 1D only added 5.5 million fans to their feed.

Justin's 'Beliebers' were the most tweeted about fans, Beyoncé's surprise self-titled LP was the most mentioned album on the site and Pharrell Williams' song 'Happy' achieved the most tweets of any track.

2014's most-tweeted about artists:

1. Justin Bieber

2. Niall Horan

3. Harry Styles

4. Liam Payne

5. Ariana Grande

6. Demi Lovato

7. Lady Gaga

8. Beyonce

9. Louis Tomlinson

10. Taylor Swift

Top music artists who experienced the most Twitter follower growth in 2014:

1. @KatyPerry: gained 13 million followers

2. @JustinBieber: gained 11 million followers

3. @TaylorSwift13: gained 10 million followers

4. @ArianaGrande: gained 9.5 million followers

5. @JTimberlake: gained 9.1 million followers

6. @SelenaGomez: gained 7.9 million followers

7. @DDlovato: gained 6.2 million followers

8. @Rihanna: gained 6.2 million followers

9. @BritneySpears: gained 6.1 million followers

10. @OneDirection: gained 5.5 million followers

2014's most tweeted-­about fan armies:

1. Beliebers -­ (Justin Bieber )

2. Directioners -­ (One Direction)

3. Animals -­ (Ke$ha)

4. Lovatics -­ (Demi Lovato)

5. Sones -­ (Girls' Generation)

6. Rihanna Navy -­ (Rihanna)

7. Mahomies/Mahonies -­ (Austin Mahone)

8 Swifties -­ (Taylor Swift)

9 Aliens -­ (Tokio Hotel)

10. Selenators -­ (Selena Gomez)

A sampling of 2014's top tweeted-­about songs: *Note: This data is based on Tweets mentioning the song and terms about the artist:

1. Pharrell Williams -­ Happy

2. John Legend -­ All Of Me

3. Nicki Minaj -­ Anaconda

4. Ariana Grande -­ Problem

5. Lady GaGa -­ ARTPOP

6. Magic! -­ Rude

7. Demi Lovato -­ Really Don't Care

8. Beyonce -­ Drunk In Love

9. One Direction -­ Night Changes

10. Little Mix -­ Little Me

2014's most-­tweeted-­about albums:

1. Beyoncé, Beyoncé

2. 5 Seconds of Summer, 5 Seconds of Summer

3. Taylor Swift, 1989

4. Michael Jackson, Xscape

5. Ed Sheeran, X

6. Chris Brown, X

7. Coldplay, Ghost Stories

8. Rick Ross, Mastermind

9. The Vamps, Meet the Vamps

10. Ariana Grande, My Everything