UPDATE: According to this reddit post, Lil Peep was on his tour bus in Tuscon when paramedics were called. Coroner showed up to the scene soon after, where he was presumably pronounced dead.
News has started circulating on Twitter that Soundcloud rapper Lil Peep has died. He turned 21 on November 1.
Cause of death is still unknown at this time, rumored as an overdose, but contemporaries such as Lil Pump, Rich Chigga, Lil Yachty and Marshmello have been sending out their condolences on Twitter in the past half hour. 
24 hours ago, Lil Peep posted on Instagram, “When I die you’ll love me.”
https://www.instagram.com/p/BbgdapGFR0c/
We will update this post as more information becomes available.
RIP LIL PEEP
— Lil Pump (@lilpump) November 16, 2017
R.I.P. Lil Peep. im glad i got to meet you when we were in dc, this shit is crazy.
— Rich Brian (@richbrian) November 16, 2017
Damn who would of thought the first time I️ met you would be the last time rest in paradise @Lilpeep
— Denzel Curry (@denzelcurry) November 16, 2017
So young. So sad. RIP @Lilpeep
— Zane Lowe (@zanelowe) November 16, 2017
No. Not lil peep 💔
— pw (@petewentz) November 16, 2017
https://twitter.com/JODYHiGHROLLER/status/931050717028036608
Shocked about Lil Peep
Life is unpredictable so pls pay attention to & support ur loved ones when they need it
Gone way too soon
RIP 💔
— Brownies & Lemonade🍫🍋 (@TeamBandL) November 16, 2017
R.I.P Lil Peep Dawg
— CONCRETE BOY BOAT^ (@lilyachty) November 16, 2017
I cant even believe this. We were just talking last week about working on a song together and now you’re gone. You will be missed, R.I.P. @Lilpeep 😪 pic.twitter.com/GQRJe8Vck0
— marshmello (@marshmello) November 16, 2017
Peep was the nicest person. hanging out with him, talking to him about music, the song ideas we were going to do together and touring was so amazing. Everyone will miss you man @Lilpeep
— marshmello (@marshmello) November 16, 2017
rest in peace @Lilpeep. pic.twitter.com/4Mgi57n5nQ
— emo nite (@emonitela) November 16, 2017
LONG LIVE LIL PEEP #RIP pic.twitter.com/FitKcG4fVd
— GORDO (@GordoSZN) November 16, 2017
tell ur friends u love them, talk to people about ur problems, let ur friends know they're not alone. know u arent alone. idk. im sad. depression isnt trendy its an awful rotting feeling. lil peep deserved a happy ending.
— elijah daniel (@elijahdaniel) November 16, 2017
https://twitter.com/bleepbloopbass/status/931049392622018560
https://twitter.com/KayzoMusic/status/931042528828178432
