5 Seconds of Summer's sophomore LP Sounds Good Feels Good is nearing closer to its release date (Oct. 23) and the guys have been doing promo for it around the clock.

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The guys have been making stops in their homeland, the United Kingdom and more to talk about this lyrically deep album.

Fans of the Australian pop/punk rockers that have pre-ordered the album on iTunes have been gifted with the following tracks in advance of the official release: "She's Kinda Hot," "Money," "Jet Black Heart," "Fly Away" and their second single "Hey Everybody!"

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Some fans have been lucky enough to preview other tracks through listening parties with radio stations and so on as Ashton Irwin, Luke Hemmings, Michael Clifford and Calum Hood do promo for it.

One song in particular that the Aussies are quite fond of is called "Invisible," which is the 14th track on the deluxe version. Irwin explained to Shazam Top 20 as seen in the below video that this song is pretty intense.

"'Invisible' is probably one of the darker songs on the album I think," the drummer dished, adding, "It's a pretty sad song. It's about feeling lost in the comfort of your own home and ignored by people who should love you and they don't."

The 21-year-old added the concept is "about a kid who runs away and no one even notices.

"It's pretty full on," Irwin further divulged, adding, "It's a deep song. It's not a happy song at all.

"It's not your conventional pop song at all. It's really cool and meaningful song to us and it describes how you feel when you're trapped and that's why it's on the album," Irwin concluded.