How many singles has Justin Bieber released with the rapper Ludacris?

Question: How many singles has Justin Bieber released with the rapper Ludacris?

Options:

One
Two
Three
Four

Correct answer:

Two

Other game answers:
Find the answers to guess the gif, logo quiz 2015, emoji puzzle and emoji nation.
You can find other questions and answers of trivia crack at triviacrackcheats.org (other languages are also available, for this game).