Ashton Irwin is remembering his times with Liam Payne following the 31-year-old singer's shocking death last week. On Tuesday (Oct. 22) - six days after Payne suffered a fatal fall in Buenos Aires, Argentina - the 5 Seconds of Summer drummer opened up about the "sunken heart feeling" of losing his friend in a string of tweets.

Members of 5 Seconds of Summer are reflecting on their relationship with Liam Payne two days after his Wednesday, Oct. 16 death. The band toured with One Direction for several years, opening for the boy band on its Take Me Home and Where We Are tours.

This article contains mentions of an individual's death. Liam Payne's unexpected death has left the world mourning the loss of the star, who was a part of one of the former biggest boybands, One Direction.