"Youngblood" is a song by the Australian band 5 Seconds of Summer, released in 2018. It features a catchy pop-rock sound and explores themes of youthful love and longing. The lyrics convey the emotional intensity of a relationship where one partner feels a strong connection despite challenges. The song was well-received, reaching high positions on various music charts worldwide. It showcases the band's signature style, blending energetic instrumentals with relatable lyrics. "Youngblood" has become one of 5 Seconds of Summer's most popular tracks, contributing to their growing international success.