Kelly Clarkson‘s latest performance got attention for not only her incredible vocals but also for a subtle yet powerful lyric change. The singer, 39, covered Billie Eilish‘s song “Happier Than Ever” on The Kelly Clarkson Show on Sept. 30 and after she put her own twist on one of the lines in the tune, some fans are thinking it was aimed at her ex-husband Brandon Blackstock, 44.