Trainor and Legend 's first performance together of " Like I 'm Gon na Lose You " was at the 2015 Billboard Music Awards on May 17 , 2015 . According to Hugh McIntyre of '' Forbes '' , the rendition was widely applauded . It was the third most-tagged performance of the night on Shazam . William Gruger of '' Billboard '' wrote , " It 's notable that Shazam was so popular with the slow , ballad-oriented tracks , which suggested that they were some of the most engaging moments of the evening " . The performance spurred a 45 % increase in '' Title '' s unit sales in the United States , helping it rise seven positions to number five on the '' Billboard '' 200 that week . Trainor climbed from number seven to number four on the '' Billboard '' Artist 100 as a result . Joe Lynch of '' Billboard '' described the rendition as " one of the night 's quiet victories : Not a show-stopper , but a performance that stuck with you "
2015 Billboard Music Awards
2015 Billboard Music Awards
Like I'm Gonna Lose You