One Direction announces its next new single 'best song ever' and it's already trending on Twitter, with Directioners beyond stoked for the preview. These guys quite cleverly made the song introduction during the first official trailer for 1D 3D, This is Us. It's an upbeat, pop tune that is very 1D. Some of the lyrics that we can hear go 'and we dance all night to the best song ever' with 'best song ever' being on the chorus loop. We like what we hear so far, and lucky for everyone, we know that the single is available to the public on Monday, July 22. And, get this: the guys will perform Best Song Ever for the first time on tv as the opening act for the 2013 Teen Choice Awards on Sunday, August 11. We will actually be on-site at the awards show, so subscribe to ClevverTV for interviews with all of your favorite stars. And if you want to check out the official This is Us trailer, click the link below. It just debuted on VEVO today, and in it, we see tons of clips of the guys on-stage performing, getting fit for costumes and hanging out. We love seeing the adorable photos from when each guy was a kid -- how cute are they all?? We also get to see the dudes revisit old places -- like their first place of work, there are features with some of their family members and experiencing new cultures on tour. It's a fun trailer and we can't wait to see 1D This Is Us when it hits US theatres on August 30..