It looks like Halsey, Machine Gun Kelly and 5 Seconds Of Summer's Luke Hemmings were jamming at the Mayday Parade 10-year A Lesson In Romantics tour last night in Los Angeles.

Read more: Turns out rapper Machine Gun Kelly loves Blink-182 just as much as the rest of us

It started when Joe Taylor, whose band Knuckle Puck are supporting Mayday Parade alongside Milestones, posted on Twitter: “Heard that @halsey @machinegunkelly @Luke5SOS and some others were at the show in LA last night. Can anyone confirm?”

Someone replied, confirming AP 345 cover star MGK and Halsey (both wearing beanies in the background):

Others replied saying Hemmings was on his girlfriend Arzaylea's Snapchat at the show:

And, in fact, they were:

Mayday Parade are on a lengthy tour celebrating A Lesson In Romantics.

Dates:

Apr 7    House of Blues Anaheim, CA    Tickets
Apr 8    The Fillmore San Francisco, CA    
Apr 9    Ace of Spades Sacramento, CA    
Apr 11    Wonder Ballroom Portland, OR    
Apr 12    The Showbox Seattle, WA    Tickets
Apr 13    Vogue Theatre Vancouver, British Columbia    
Apr 15    MacEwan Ballroom Calgary, Alberta    
Apr 16    Union Hall Edmonton, AB    
Apr 18    The Garrick Centre Winnipeg, MB    
Apr 20    First Avenue Minneapolis, MN    
Apr 21    The Rave Milwaukee, WI    Tickets
Apr 22    House of Blues Chicago Chicago, IL    Sold Out
Apr 23    Granada Theater Lawrence, KS    
Apr 25    The Deluxe at Old National Centre Indianapolis, IN    
Apr 26    Bogart's Cincinnati, OH    Tickets
Apr 27    Newport Music Hall Columbus, OH    
Apr 28    Stage AE Pittsburgh, PA    
Apr 29    Agora Ballroom Cleveland, OH    
Apr 30    The Crofoot Ballroom Pontiac, MI    
May 2    Town Ballroom Buffalo, NY    Tickets
May 3    Phoenix Concert Theatre Toronto, Ontario    
May 4    Corona Theatre Montreal, QC    Presale 1/25 @ 12pm EST
May 5    House of Blues Boston Boston, MA    
May 6    College Street Music Hall New Haven, CT    
May 7    Upstate Concert Hall Clifton Park, NY    
May 9    Webster Hall New York, NY    Sold Out
May 11    The Paramount Huntington, NY    Presale 1/25 @ 12pm EST
May 12    Starland Ballroom Sayreville, NJ    Sold Out
May 13    The Fillmore Philadelphia, PA    
May 14    The Fillmore Silver Spring, MD    
May 16    The NorVa Norfolk, VA    
May 17    Lincoln Theatre Raleigh, NC    
May 18    Mercury Ballroom Louisville, KY    Presale 1/25 @ 12pm EST
May 19    Cannery Ballroom Nashville, TN    
May 20    Masquerade Atlanta, GA    
May 21    Iron City Birmingham, AL    
May 23    Music Farm Charleston, SC    Presale 1/25 @ 12pm EST
May 24    Mavericks Jacksonville, FL    
May 25    Revolution Live Ft. Lauderdale, FL    
May 26    House of Blues Lake Buena Vista, FL    
Oct 28 – Nov 1    Warped Rewind at Sea New Orleans, LA

Watch more: APTV Beyond The Shoot—Machine Gun Kelly (MGK) Cover Shoot