In a new sneak-peek episode of "Keeping Up with the Kardashians", Kylie felt "sick" and was going to "faint" when she was about to do a solo red carpet interview at the 2015 Billboard Music Awards in May, reported Ace Showbiz.
"Now I feel too sick. No, I feel like I'm really gonna faint," she said before subsequently trying to move away from the interview spot.
Both Kylie, 18, and her 19-year-old elder sister attended the awards event together. They, however, had to part ways as Kendall was promoting her H&M and Balmain campaigns.
Because of her contracts with the fashion lines, Kendall even had to ask permission for taking a photo with her younger sister.
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"Am I not supposed to? Should I not take a photo with her?" Kendall asked. They were then allowed to take one photo together before going their separate ways.
Kylie, who was scheduled to do an interview on the red carpet, said, "I totally understand that Kendall has these work obligations, but I'm getting super nervous and anxious about doing these interviews...