Sad news for One Direction fans! Hot band 5 Seconds of Summer had to cancel opening for 1D on certain tour dates, but why?

Simon Cowell Defends One Direction After Leaked Video

5 Seconds of Summer had to cancel opening for the heartthrobs in Copenhagen and Portugal during 1D's international summer tour.

"Due to unforeseen circumstances we have had to cancel our support sets on the 1D Tour for Copenhagen on June 16th/17th and Porto on July 13th :( McBusted are now going to be playing in Copenhagen and D.A.M.A will be opening in Porto, so it's still going to be a wicked bunch of shows!" 5SOS posted on their Tumblr page.

One Direction actually helped discover 5 Seconds of Summer, so it's no surprise the bands are touring together, even if 5SOS had to cancel a few tour dates.

"We discovered 5SOS on YouTube last year and we all knew straight away they were very special," Niall Horan said previously." We're so excited to have them on the road with us and we know our fans are going to LOVE what these lads do."

"Supporting 1D is going to be amazing," drummer Ashton Irwin said before starting the Where We Are tour. "We still can't believe how far we have come since playing our first show at the Annandale a year ago. We love our fans that have continually supported us and can't thank them enough for getting us to where we are today."

Harry Styles Tells Fan Not To Go Through With Wedding?

One Direction just finished headlining Wembley Stadium with 5SOS and couldn't have been more excited about it. "Thanks everyone for an incredible weekend at wembley!" Horan wrote. "One I won't forget !"