20 February 2013, 16:46
The 'Kiss You' singer also says he is "absolutely" looking forward to Justin Timberlake's performance.
One Direction star Harry Styles has spoken to Capital ahead of the band's performance at the BRIT Awards 2013 later today (20th February).
The 'Live While We're Young' singer says he couldn't sleep very well yesterday and was "really nervous" in rehearsals for their appearance this afternoon, which will see the UK boy band performing their new charity single 'One Way Or Another (Teenage Kicks)'.
"I'm a little bit tired," Harry admitted to Capital FM's Max this afternoon. "I couldn't sleep very well last night!
"I was really nervous," the boy band star said of One Direction's last minute rehearsals today. "I don't know [why], there was no one even in the room!"
Harry went on to say that he is "absolutely" excited about seeing Justin Timberlake perform later this evening, as well as revealing he expects at least one special guest at the show tonight.
"Well, there's one dressing room that just says special guest, which always makes everyone wonder," Harry teased, before revealing his plans for the evening: "I'll see where the night takes me!"
Check out a picture of Harry Styles with Capital FM presenter Max backstage at the BRITs below (Credit: Capital FM):
Earlier today Harry's bandmate Liam Payne also spoke to Capital and promised "some fireworks" and "a lot of lights" for their BRITs performance.
The BRIT Awards 2013 kicks off from 8pm today with host James Corden at London's O2 Arena.
Listen to Harry Styles talking to Capital FM at the BRIT Awards 2013 today below: