Inilabas na noong November 20 ang inaabangang collaboration nina Josh Cullen ng SB19 at ng K-pop group na H1-KEY sa kantang "RE: Thinkin&rsquo; About You". Ang proyekto ay unang inanunsyo sa official page ng H1-KEY noong November 12, na agad nagpa-excite sa fans ng parehong artists.
<blockquote class="twitter-tweet">
✉️🖤 H1-KEY(하이키), JOSH CULLEN ⌜Re: Thinkin' About You⌟ COMING SOON 🗓️ 2024.11.20 6PM (KST)<a href="https://twitter.com/hashtag/H1KEY?src=hash&amp;ref_src=twsrc%5Etfw">#H1KEY</a> <a href="https://twitter.com/hashtag/%ED%95%98%EC%9D%B4%ED%82%A4?src=hash&amp;ref_src=twsrc%5Etfw">#하이키</a> <a href="https://twitter.com/hashtag/%E3%83%8F%E3%82%A4%E3%82%AD%E3%83%BC?src=hash&amp;ref_src=twsrc%5Etfw">#ハイキー</a><a href="https://twitter.com/hashtag/JOSHCULLEN?src=hash&amp;ref_src=twsrc%5Etfw">#JOSHCULLEN</a> <a href="https://twitter.com/JoshCullen_s?ref_src=twsrc%5Etfw">@JoshCullen_s</a><a href="https://twitter.com/hashtag/Re_ThinkinAboutYou?src=hash&amp;ref_src=twsrc%5Etfw">#Re_ThinkinAboutYou</a><a href="https://twitter.com/hashtag/SEOI?src=hash&amp;ref_src=twsrc%5Etfw">#SEOI</a> <a href="https://twitter.com/hashtag/RIINA?src=hash&amp;ref_src=twsrc%5Etfw">#RIINA</a> <a href="https://twitter.com/hashtag/HWISEO?src=hash&amp;ref_src=twsrc%5Etfw">#HWISEO</a> <a href="https://twitter.com/hashtag/YEL?src=hash&amp;ref_src=twsrc%5Etfw">#YEL</a> <a href="https://t.co/CjlcErs6fb">pic.twitter.com/CjlcErs6fb</a>
&mdash; H1-KEY (@H1KEY_official) <a href="https://twitter.com/H1KEY_official/status/1856623048540946833?ref_src=twsrc%5Etfw">November 13, 2024</a></blockquote>
 Matagal nang may interaksyon sina Josh at ang mga miyembro ng H1-KEY na sina Seoi, Riina, Hwiseo, at Yel. Noong January 27, nag-post ang grupo ng dance cover sa TikTok ng kanta ni Cullen na "GET RIGHT," na sinundan ng isa pang dance cover ng kanta ng H1-KEY na "Thinkin&rsquo; About You."
 Plano sana nilang magtanghal nang magkasama noong March sa &ldquo;Go Run!&rdquo; Manila concert ng H1-KEY, pero nakansela ang event dahil sa hindi inaasahang mga pangyayari. Gayunpaman, muli silang nagkasama sa entablado para sa isang collab performance sa 2024 ROUND Festival sa Busan, South Korea.
 Sa kolaborasyong ito, pinatunayan ng SB19 lead rapper at vocalist ang kanyang versatility bilang artist at ipinamalas ang Pinoy creativity sa mundo ng K-pop.
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