The world premiere of DEF LEPPARD's new single, 'Undefeated', will take place tomorrow, April 12th April exclusively on Planet Rock's Rob Birnie Show (starting at 9 AM UK time, 4 AM EST, 1 AM PST).

'Undefeated' is taken from the band's new live album, Mirrorball, and is one of three brand new studio recordings. The new album hits stores in the first week of June and contains two discs of live material, three new studio tracks, a DVD of live performances and a documentary about life on the road with the band.

Be sure to tune in to Joe Elliott's very own show every Saturday from 6 PM, only on Planet Rock, on which he plays the music that inspired him over the years. Listen live to Planet Rock at this location.

Def Leppard will guest on US syndicated radio show Rockline on Wednesday, May 11th. The program airs at 8:30 PM (PT) / 11:30 PM (ET). Fans are encouraged to speak with the guests by calling 1-800-344-ROCK (7625). For a station near you and for information regarding how to log onto the internet for the broadcast go to RocklineRadio.com.

Def Leppard are set to release a brand new live album, Mirrorball, this summer featuring a mix of live classics (recorded throughout The Sparkle Lounge Tour), three brand new studio songs and a bonus DVD that contains energetic live performances and intimate backstage footage captured on the road.

Mirrorball is Def Leppard's first ever live album and features rock classics such as 'Animal', 'Pour Some Sugar On Me', 'Photograph', 'Nine Lives' and 'Rock Of Ages. The album also brings together three brand new studio tracks - 'Undefeated', 'Kings Of The Wordld' and 'It's All About Believin'.

The full tracklisting is as follows:

Disc 1:

'Rock! Rock! (Till You Drop)'

'Rocket'

'Animal'

'C'Mon C'Mon'

'Make Love Like A Man'

'Too Late For Love'

'Foolin'

'Nine Lives'

'Love Bites'

'Rock On'

Disc 2:

'Two Steps Behind'

'Bringin' On The Heartbreak'

'Switch 625'

'Hysteria'

'Armageddon It'

'Photograph'

'Pour Some Sugar On Me'

'Rock Of Ages'

'Let's Get Rocked'

'Action'

'Bad Actress'

'Undefeated' (new studio track)

'Kings Of The World' (new studio track)

'It's All About Believin' (new studio track)

Mirrorball will also be available online, marking the first time the band's music will officially be made available for digital purchase. Def Leppard will also be releasing their new community based website in May, which is being developed to be the ultimate Def Leppard fan experience and go-to destination for all things on the band.

Also set for release this summer is Leppard's first coffee table book titled, Def Leppard - The Definitive Visual History, with exclusive photos by legendary rock photographer Ross Halfin. The book will be released on June 1st.

2011 will see Def Leppard headline Download Festival for the second time in three years. The band will also play Arena shows in both Dublin and Belfast with legendary special guests ALICE COOPER and THIN LIZZY. Full details below:

June

7 - The Odyssey Arena, Belfast, N. Ireland
8 - The O2, Dublin, Eire
10 - Download Festival, UK

With more than 65 million albums sold worldwide and two prestigious Diamond Awards (Def Leppard are one of only five rock bands to have two consecutive 10 million plus selling albums in the US - the others are THE BEATLES, LED ZEPPELIN, PINK FLOYD and VAN HALEN) to their credit.

Def Leppard's Mirrorball will be released through Bludgeon Riffola/Mailboat Records in the following territories on the following dates:

Germany / Switzerland / Austria - June 3rd

UK / Europe - June 6th

North America - coming this summer, exact date TBA