Question: Keith Justin Hetrick has worked with an American rapper who is best known for "Watch Me (Whip/Nae Nae), which reached what number on the Billboard Hot 100?

Related documents: [0]  [DOC] Keith Justin Hetrick is a Grammy-nominated songwriter and record producer currently based in Nashville, TN. He has worked with notable artists such as Charlie Wilson, Boyz II Men, Snoop Dogg, Shaggy, T.I., Pitbull, Fifth Harmony, Cher Lloyd, Aston Merrygold, Silentó, The Jacksons, Ray Parker Jr., Teddy Riley, Paulina Rubio, Sophia Grace, Inna. [END] 
[1]  [DOC] Ricky Lamar Hawk (born January 22, 1998), better known by his stage name Silentó, is an American rapper. He is best known for his debut single "Watch Me (Whip/Nae Nae)", which reached number three on the "Billboard" Hot 100. [END]  
Answer: three
three