(CNN) Videos released on social media showed Ariana Grande crying onstage at a recent concert.

The "thank u, next" singer was seen in the video appearing to struggle getting through a song. Fans took to Twitter showing their support and concern for Grande who then tweeted out a long letter Sunday.

"I feel everything very intensely and have committed to doing this tour during a time in my life when I'm still processing a lot ... so sometimes I cry a lot! I thank you for accepting my humanness," the letter said.

Grande, 26, said she was "grateful for the sea of love" she has around her.

"No matter how hard it gets or how many feelings come up that are screaming at me to be processed and sorted through one day, I'm grounded by gratitude and promise not to give up on what I've started," her letter read.