5 Seconds of Summer Celebrates Their 10th Anniversary: See the Band's Evolution in Pictures

Photo: Noel Kessel/Newspix/Getty Images; Emma McIntyre/Getty Images 5 Seconds of Summer have come a long way. Since then, they have released four studio albums, received numerous accolades and had their songs charted in multiple different countries. Just as their music has evolved over the years, Luke Hemmings, Michael Clifford, Calum Hood, and Ashton Irwin have all grown up in the spotlight. Now, as the band celebrates their 10th anniversary, fans are feeling super nostalgic.

5 Seconds of Summer Is Here to Stay as They Celebrate 10 Years: 'It's Kind of Like a Marriage, Isn't It?'

Ten years of summer!5 Seconds of Summeris in full celebration mode. On Friday, the pop-rock band released “2011,” a single honoring their 10 years as a group — and they also are hosting a livestream concert-meets-movie, The Five Seconds of Summer Show, for fans to enjoy.The boys —Michael Clifford,Luke Hemmings,Calum HoodandAshton Irwin— were just in their teens when they “were dreaming big” in the outskirts of Western Sydney. And now, as adults, Clifford tells PEOPLE that there’s a lot more 5SOS to come.

5 Seconds of Summer's Luke Hemmings Hints He's Married to Sierra Deaton in New TikTok

Luke Hemmings and Sierra Deaton.Photo: Bennett Raglin/Getty Has another 5SOS bandmate said “I do?” On Monday, 5 Seconds of Summer musicianLuke Hemmingsshared a TikTokthat left fans buzzing with questions as to whether he’s already tied the knot with fiancéeSierra Deaton. As he sings the track, a voiceover says, “When you marry the girl that wrote this banger.” A rep for Hemmings did not immediately respond to PEOPLE’s request for comment.

5 Seconds of Summer's Michael Clifford Is Engaged to Girlfriend Crystal Leigh

Congratulations are in order for Michael Clifford and Crystal Leigh! The5 Seconds of Summerlead guitarist popped the question to his girlfriend of three years during a stunning beachside sunset picnic on Friday. The pair were celebrating their three-year anniversary at the Ungasan Clifftop Resort in Bali — the same place they began dating and shared their first kiss — when Clifford asked Leigh to marry him. Opening up about the exciting news on hissocial media accounts, the musician, 23, explained that the Indonesian island held a special significance to the couple.

5 Secrets to Kate Middleton and Prince William's 11-Year Royal Marriage

Prince William and Kate Middleton.Photo: Chris Jackson/Getty Kate MiddletonandPrince Williamare celebrating their 11th wedding anniversary on Friday. After 11 years of marriage, what’s the secret to their successful royal love? The Duke and Duchess of Cambridge tied the knot at Westminster Abbey in London on April 29, 2011. They are now full-time working members of the royal family and parents of three —Prince George, 8,Princess Charlotte, 6, andPrince Louis, 4 — and slowly introducing their children to royal life.