Selena’s stepfather was Christina’s manager, so the girls were close, and you could see this in her performance as she broke down in tears during the tribute.
The star sang "Nobody" to Christina, and was clearly extremely sad about her passing.
Watch Selena’s emotional tribute below.
Our thoughts are with Selena, Christina’s fans, and especially for Christina’s friends, family, and loved ones.
Send your thought and prayers to Christina’s loved ones in the comments below.