News Carrie Underwood hilariously sings ‘Happy Birthday’ to her son after inhaling helium March 1, 2019 Susan Haas, USA TODAY Comments Off on Carrie Underwood hilariously sings ‘Happy Birthday’ to her son after inhaling helium Professional singer or not, if you inhale helium, you sound silly. That was the point for Carrie Underwood when she sang "Happy Birthday" to her son.