Saturday promises to be the hottest date on the calendar for One Direction fans, with the band set to take part in a seven-hour live internet broadcast.

Organised to mark the release of the band’s new album "Midnight Memories," 1D Day will be streamed around the world on YouTube and Google+ starting from 7 p.m. (GMT)/2 p.m. EST, allowing One Direction lovers in every corner of the globe to watch live at the same time.

As well as playing exclusive tracks from their new album, the stream will also see appearances from some of the boys’ top showbiz pals including Celine Dion, Simon Cowell, Piers Morgan, and The Muppets.

Lucky fans will also get the opportunity to hang out with the guys and participate live in the stream, with the band set to surprise 1Ders by dropping into their Google+ Hangout parties and chatting live face-to-face in a special feature called One Big Drop In.

And that’s not all. Our official adjudicators will also be on hand as Harry, Liam, Niall, Zayn and Louis attempt to add to their collection of Guinness World Records titles during the stream with a series of challenges.

"It will be broadcast all over the world and people can watch them present for a seven hour marathon linking in to lots of shows across the world connecting with fans," 1D Day producer and director Ben Winston told MTV News. "And it's almost like the most amazing webcam broadcast you could ever imagine."

"We are going to try and break a world record every hour," Winston said. "For things like how many toilet rolls can you pile up in a pile."

The boys already lay claim to the world record for having the most followers on Twitter for a music group with with 12,130,152 followers as of 16 May 2013.

They also hold the record for Highest debut by a UK group on the US singles chart for “Live While We’re Young”, which entered the charts at No. 3 on 20 October 2012 and also have the title for First UK group to debut at No. 1 in the USAwith a debut album after "Up All Night" debuted at No. 1 with first-week sales of 176,000 in March 2012.

Speaking ahead of the event, singer Liam said: "1D Day is all about giving back to our amazing fans for supporting us for the past three years.

"When we suggested it, we never thought anyone would let us loose LIVE all day — we cannot wait!"

1D Day can be viewed in all countries by visiting: or

To find out how to hang out with the boys visit for more information. Be sure to let us know what you think about the group's record attempts on Facebook and Twitter ( @GWR) with the hash tag #1Dday!