Title
Certification
Chart Position Peak
Weeks On Chart
grace kelly (2007)
1  (1 week)
12
relax (take it easy) (2007)
3
9
love today (2007)
23
3
big girl (you are beautiful) (2007)
16
5
happy ending (2007)
26
2
lollipop (2008)
13
7
rain (2009)
18
1
blame it on the girls (2009)  
21
 
popular song (feat. ariana grande) (2013)
x2
1  (2 weeks)
10
stardust (feat. chiara) / underwater (2013)
1  (1 week)
7
origin of love (2014)  
9
5
good guys (2015)
1  (1 week)
 
staring at the sun (2015)  
15
stardust (feat. karen mok) (2016)
1  (1 week)
7+
it's my house (2018)  
12


Title
Certification
Chart Position Peak
Weeks On Chart
life in cartoon motion (2007) x2
1  (1 week)
21
the boy who knew too much (2009)  
22
the origin of love (2013)  
20
1
songbook vol. 1 (2013)
x2
1  (1 week)
11
no place in heaven (2015)
1  (1 week)