But they are two twin brothers from Brooklyn, and their performances are sweet music to the ears of straphangers.
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Amiri and Rahiem Taylor are identical twins, born and raised in Bed-Stuy.
The brothers are also featured in a viral video, that at last check had 18 million views.
As children, their home was always filled with music, both jazz and classical.
But when their grandmother gave them a Christmas gift when they were about 15 years old, their musical world expanded.
The teens became obsessed with the Beatles rock band video game and fell in love with the group's universal sound.
Amiri and Rahiem also write and produce their own music and are half of the group Blac Rabbit, a psychedelic rock band.
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About three years ago, the brothers wanted to go visit their mom in Puerto Rico but didn't have enough money.
They headed to the subway and started singing. In just three days they made enough for two roundtrip plane tickets and spending money.
When they returned they stopped playing for a bit and worked as cashiers in a grocery store but realized music was their passion.
They quit and have been jamming ever since. They hope to own their own record label one day and produce for other artists.
You can catch Blac Rabbit on March 17th at Union Pool in Brooklyn and follow them at @blacrabbitband on Instagram.