Rihanna have the most songs(10) on ALL TIME 200, for total sales of 32,905,031(top 200 only).
Here is the latest data on SoundScan, which update this week
Umbrella 3,789,674
Don't Stop The Music 3,155,651
DISTURBIA 4,147,901
LIVE YOUR LIFE 4,088,219
TAKE A BOW 2,487,047
RUN THIS TOWN 2,767,366
RUDE BOY 2,473,069
LOVE THE WAY YOU LIE 4,692,186
ONLY GIRL (IN THE WORLD) 2,765,551
WHAT'S MY NAME? 2,538,367
here is some sales of other artist.
BEP
I GOTTA FEELING 7,009,921
BOOM BOOM POW 5,947,264
IMMA BE 3,380,907
LET'S GET IT STARTED 2,737,511
TIME (DIRTY BIT) 2,685,593
MY HUMPS 2,605,556
MEET ME HALFWAY 2,449,779
Lady Gaga
JUST DANCE 6,085,113
POKER FACE 6,060,973
BAD ROMANCE 4,695,455
PAPARAZZI 2,967,463
TELEPHONE 2,863,660
LOVEGAME 2,361,445
ALEJANDRO 2,147,879
fergie
BIG GIRLS DON'T CRY 3,656,373
FERGALICIOUS 2,948,950
GLAMOROUS 2,877,873
CLUMSY 2,191,447
LONDON BRIDGE 2,158,003
AKON
AKON FEAT. EMINEM SMACK THAT 3,084,473
GUETTA*DAVID FEAT. AKON SEXY CHICK 3,036,809
STEFANI*GWEN FEAT. AKON SWEET ESCAPE 2,916,016
AKON RIGHT NOW (NA NA NA) 2,383,766
AKON DON'T MATTER 2,362,446
AKON I WANNA LOVE YOU 2,184,040
BEYONCE
SINGLE LADIES (PUT A RING ON I 4,489,849
IRREPLACEABLE / IRREEMPLAZABLE
2,914,424 TELEPHONE 2,863,660
HALO 2,736,140
IF I WERE A BOY 2,533,515
Katy Perry
HOT N COLD 4,804,650
CALIFORNIA GURLS 4,725,487
I KISSED A GIRL 4,003,119
FIREWORK 3,917,304
TEENAGE DREAM 3,531,257
Ludacris
BREAK YOUR HEART 3,402,870
YEAH 3,030,590
BABY 3,010,713
GLAMOROUS 2,877,873
TONIGHT (I'M LOVIN' YOU) 2,293,679
Taylor
LOVE STORY 4,955,815
YOU BELONG WITH ME 3,676,568
OUR SONG 2,778,686
TEARDROPS ON MY GUITAR 2,583,819
FLO RIDA FEAT. T-PAIN LOW 5,872,984
KE$HA TIK TOK 5,740,425
MRAZ*JASON I'M YOURS 5,626,155
TRAIN HEY, SOUL SISTER 5,302,941
400
Katy is the digital queen!!
