Alarm!

So...Phoebe thought it would be fun to set an alarm to go off at midnight and wake her Dad up.At 11.45pm and the song "Waka Waka" blares out. Will wakes after about a minute wondering what is going on and I explain the joke.The music plays on loudly with no sign of Phoebe stirring. I get up to turn it off but hold it close to her sleeping head first.....nothing.She sleeps oblivious!