A mother battling Stage 4 cancer got a huge surprise on The Ellen DeGeneres Show on Monday when Martina McBride joined her 4-year-old daughter to sing an encore of “I’m Gonna Love You Through It.” You may remember the little girl’s viral video performance last week. The country superstar sang with McKenna but let her take it when it was time for the little girl to belt out the song’s biggest and most powerful lines. “I’m gonna love you through it” she shouts during each chorus. Most in the audience could not hold it together, and then everyone lost it when DeGeneres announces that Shutterfly was kicking in a $20,000 check for medical bills. MORE