After School discography
As lead artist
Table:
List of singles as lead artist, with selected chart positions, showing year released and album name

Title

Year

Peak chart positions

Sales

Album

KOR
Gaon Album
[9][B]

KOR
Gaon Digital
[10][B]

KOR
Hot 100
[11]

JPN
Oricon
[12]

JPN
Hot 100
[13]

TW
[14]

Korean

"Ah"[C]

2009

—
—
—
—
—

9[D]

KOR: 10,000+ (CD)

Non-album single

"Diva"[E]

—
—
—
—
—

"Because of You" (너 때문에)

—
1[F]
—
—
—

KOR: 20,000+ (CD)

KOR: 4,000,000+ (DL)[G][3]

Virgin

"Bang!" (뱅!)

2010

2
2
—
—
—
—

KOR: 15,914+ (CD)[3]

KOR: 2,374,731 (DL)[3]

"Love Love Love"

2
8
—
—
—
16

KOR: 10,000+ (CD)

Happy Pledis 1st Album

"Shampoo"

2011

—
4
—
—
—
—

KOR: 1,614,918 (DL)

Virgin

"In The Night Sky" (밤 하늘에)[H]

21
9
—
—
—
—

KOR: 11,240+ (CD)[15]

KOR: 1,514,202 (DL)

Non-album single

"Wonder Boy"[I]

18
15
—
—
—
—

KOR: 10,000+ (CD)[15]

KOR: 1,087,842 (DL)

"Flashback"

2012

3
14
10
—
—
7

KOR: 16,885+ (CD)[16]

KOR: 1,044,540 (DL)

"First Love" (첫사랑)

2013

11
7
7
—
—
6

KOR: 13,563+ (CD)[17]

KOR: 624,880 (DL)

Japanese

"Bang!"

2011

—
—
—
7
10
5

JPN: 42,363+

Playgirlz

"Diva"

—
—
—
12
26
5

JPN: 25,000+

"Rambling Girls"

2012

—
—
—
7
24
5

JPN: 17,029+

"Because of You"

—
—
—
—

"Lady Luck"

—
—
—
6
20
4

JPN: 17,572+

Non-album single

"Dilly Dally"

—
—
—
—

"Heaven"

2013

—
—
—
7
28
7

JPN: 19,884+

Dress to Kill

"Shh"

2014

—
—
—
12
—
11

JPN: 16,483+

"—" denotes releases that did not chart or were not released in that region.

Studying the tabular data covering 'After School discography' — "As lead artist" section, draft a brief sentence that explains what the highlighted cells show and provide it inside the JSON object {"answer": "YOUR ANSWER"}.