On Dec. 3, Aussie pop-punkers 5 Seconds of Summer celebrated their third anniversary as a band. Many fans took to Twitter to wish them “happy birthday,” but perhaps the sweetest well wishes came from the lovely ladies of Fifth Harmony.

During a visit to Hot 99.5 FM, the girls sang ‘Happy Birthday’ in honor of 5 Seconds to Summer’s milestone as a band. And although this quintet is known for their blissful harmonies, they made sure to offer a punked-up version of the tune in true 5SOS fashion.

Watch the ode from one five to another in the video above, during which the girls sing the most rock ‘n’ roll “cha cha chas” we’ve ever heard and Camila even rocks out on the air guitar.

Though we may not be able to offer such a stellar rendition of ‘Happy Birthday,’ nevertheless: Happy third birthday to 5 Seconds of Summer!