Baby, One more time - Britney Spears
Cry Me A River - Justin Timberlake
Love - Keyshia Cole
No No No - Destiny's Child
Riptide - Vance Joy
Ain't it Fun - Paramore
Rather Be - Clean Bandit (only heard this once)
If we ever meet again - Timbaland ft Katy Perry
Spotlight - Jennifer Hudson
Fighter - Christina Aguilera
Bye Bye Bye - N'sync
That New Edition song where they all sound like Chipmunks (Cool it Down?)
Princess of China - Coldplay ft Rihanna
Paradise - Coldplay
Take a bow - Rihanna
Irreplaceable - Beyonce
Pon De Replay - Rihanna
Halo - Beyonce
Hate that I love you - Rihanna ft Ne-Yo
Sweet Dreams - Beyonce
Sorry - Madonna (It was my song back in 06)
Vogue - Madonna
Express Yourself - Madonna
Thinking of you - Katy Perry
U Remind Me - Mary J Blige
Real Love (?),- Mary J Blige
You don't have to call - Usher (only heard this one once)
Yo (Excuse me miss) - Chris Brown
This Christmas - Chris Brown
Someone Like You - Adele
Just haven't met you yet - Michael Bublé
Love you like a love song - Selena Gomez
Give Your Heart a break - I think Selena Gomez sings this one too.
Naturally - Selena Gomez
Love of my life - Erykah Badu ft Common
The Only Exception - Paramore
Still into you - Paramore
Get Up - Ciara ft Chamillionaire
Crazy In Love - Beyonce ft Jay Z
Some No doubt song from 2004 that I forgot the name of
I think I heard Run It by Chris Brown too.
I'm missing a few, but these are the most recognizable songs I hear at work