5 Seconds of Summer (5SoS) are an Australian pop rock band formed in Sydney in 2011. This logo of the band features titled text set in a fancy font and it can be seen in EPs like She Looks So Perfect, Somewhere New. To get a similar feel of the logo, you might try FF Dyanmo, though very close in appearance, but letters are different.
This is a 5 Seconds of Summer logo that features initials on a round dark background in a hand drawn font. You can recreate letters with a free font named Loved by the King. For the full name below, it is in Helvetica Neue Bold.
Download 5 Seconds of Summer Font
We are currently unable to find a free alternative or a font similar to the commercial font identified above, and you will need to follow the relevant links above and purchase the font.