Thanks a bunch!
I google "Oops, try again. Did you add an if statement to your code?".
Occasionally, Codeacademy incorrectly reports errors in your code based on trivial whitespace differences. Based on the output of your script, you've written your code correctly.
Funnily enough, using a ternary operator instead of an if statement works fine:
// Check if the user is ready to play!
console.log("You are at a Justin Bieber concert, and you hear this lyric 'Lace my shoes off, start racing.'");
console.log("Suddenly, Bieber stops and says, 'Who wants to race me?'");
var userAnswer = prompt("Do you want to race Bieber on stage?");
console.log( userAnswer === "yes" ?
"You and Bieber start racing. It's neck and neck! You win by a shoelace!" :
"Oh no! Bieber shakes his head and sings 'I set a pace, so I can race without pacing.'");