Michaels confirmed, "We had Ariana drop out for emotional reasons two days ago ... and then Kanye stepped up so he will be there".
Kanye West, this week's musical guest on the season premiere of NBC's Saturday Night Live, wasn't the show's first choice: the scheduled Ariana Grande canceled "for emotional reasons", says creator Lorne Michaels.
Ariana Grande gets emotional with fans on Twitter asking why she can't have "one OK day?"
The distraught 25-year-old pop star began: "can i pls have one okay day. just one. pls, ' then less than a minute latter added: 'i'm so exhausted pls".
On Thursday night, Grande posted a string of Tweets about her life.
When one fan suggested Grande do pop up shows, she replied, "a concept. i'll figure it out. i love u".
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"Can i pls have one okay day. just one. pls", Ariana first tweeted, before adding, "i'm so f-ing exhausted pls" and "jus wake me up when i'm supposed to sing or whatever. peace".
In another tweet, she explained that she "had a human moment".
Since that time, Grande has taken time for herself, choosing not to attend the Emmy Awards with her fiance, Pete Davidson, or to make any public appearances.
Miller, who she broke up with in May, had long suffered from addiction and died of a suspected drug overdose September 7.
"She will be staying close to home and using this period to spend time with her loved ones and work on new music without deadline".
'I'm trying to get my work done and get back to normal and it's hard and i'm human and exhausted. sorry i let u in or anxious u. i shouldn't have tweeted. i kno better'.