Ariana Grande is feeling sleep deprived as she promotes her new album.

The 21-year-old singer is struggling to keep up with her hectic work schedule as she travels the US spreading the message about her second LP 'My Everything' which came out on August 22.

Ariana's promotional tour comes after a busy weekend at the MTV Video Music Awards where she, Jessie J and Nicki Minaj performed their track 'Bang Bang' last Sunday (24.08.14).

Ariana has another 16-hour day ahead of her and with her lack of sleep she is hoping for a miracle and lots of coffee to pull her though.

In a Twitter post made today (28.08.14), she revealed: ''Not 1 min of sleep & have a 16 hour day ahead ... ima need a starbucks n a miracle today luvs lol #happyalbumreleaseweek #risenshinemissthing (sic)''

Although she is feeling tired, Ariana's spirits have been lifted by a gift sent to her by fellow pop star Miley Cyrus.

She tweeted: ''A special baby love sent me flowers ... @mileycyrus u are the cutest angel pie in da world (sic)''

As she couldn't sleep, Ariana spent her time reading messages sent to her on social media from her fans and she is overwhelmed by the love they have shown her.

She wrote in a series of messages: ''Another impromptu meet n greet w my ny loves until my apartment building threatened to kick me out lmao ... oooops. love u so much. was fun ... Can't sleep so creeping on the loves I met tn. I love u so so much u have no idea. like none at all. y'all are my fav in the world. my heart ... btw I meant y'all as in all my loves not only my nyc loves ... don't want anybody feelin left out! all u babies are it. for real. niiight! (sic)''