"I Need to Know" is the title of a song written and recorded by American rock

Rock music

Rock music is a genre of popular music that developed during and after the 1960s, particularly in the United Kingdom and the United States. It has its roots in 1940s and 1950s rock and roll, itself heavily influenced by rhythm and blues and country music...

 band Tom Petty and the Heartbreakers

Tom Petty and the Heartbreakers

Tom Petty And The Heartbreakers are an American rock band from Gainesville, Florida. They were formed in 1976 by Tom Petty , Mike Campbell , Benmont Tench , , Ron Blair and Stan Lynch...

. It was released in 1978 as the second single from their second album You're Gonna Get It!

You're Gonna Get It!

You're Gonna Get It! is the second album by Tom Petty and the Heartbreakers, released in 1978. Originally, the album was to be titled Terminal Romance. Like its self-titled predecessor, this album includes tight melodic songs awash in ringing guitars and organ. It reached #23 on Billboard's Top...

. It peaked at #41 on the Billboard Hot 100

Billboard Hot 100

The Billboard Hot 100 is the United States music industry standard singles popularity chart issued weekly by Billboard magazine. Chart rankings are based on radio play and sales; the tracking-week for sales begins on Monday and ends on Sunday, while the radio play tracking-week runs from Wednesday...

 singles chart in 1978.

Cover versions

Stevie Nicks

Stevie Nicks

Stephanie Lynn "Stevie" Nicks is an American singer-songwriter, best known for her work with Fleetwood Mac and an extensive solo career, which collectively have produced over forty Top 50 hits and sold over 140 million albums...

 (of Fleetwood Mac

Fleetwood Mac

Fleetwood Mac are a British–American rock band formed in 1967 in London.The only original member present in the band is its eponymous drummer, Mick Fleetwood...

) has been covering "I Need to Know" live in concert since 1981.

In 1981 the Swedish band Gyllene Tider

Gyllene Tider

Gyllene Tider is a Swedish pop group. The name Gyllene Tider translates as "Golden ages" or "Golden times". Few Scandinavians would not recognize the band's most famous song "Sommartider", often played on the radio during late spring and early summer...

 recorded a version of the song with Swedish lyics, written by singer Per Gessle

Per Gessle

Per Håkan Gessle is a Swedish pop singer-songwriter, guitarist, and harmonicist. He is the lead singer of the Swedish pop group Gyllene Tider and formed Roxette with Marie Fredriksson...

 (the male half of Roxette

Roxette

Roxette are a Swedish pop music duo, consisting of Marie Fredriksson and Per Gessle . Formed in 1986, the duo became an international act from the late 1980s, when they released their breakthrough album Look Sharp!...

), named "Vill ha ett svar!"

Poison

Poison (band)

Poison is an American glam metal band that achieved great success in the mid-1980s to mid-1990s. To date, Poison has sold over 30 million records worldwide and have sold 15 million records in the United States alone. The band has also charted ten singles to the Top 40 of the Billboard Hot 100,...

 recorded a cover of the song for their 2007 album Poison'd!

Poison'd!

Poison'd! is the seventh studio album from the American glam rock/glam metal band Poison, released June 5, 2007. The 14-track album features recordings of Poison's favorite rock classics...

.

All appearances

• You're Gonna Get It!
  You're Gonna Get It!
  You're Gonna Get It! is the second album by Tom Petty and the Heartbreakers, released in 1978. Originally, the album was to be titled Terminal Romance. Like its self-titled predecessor, this album includes tight melodic songs awash in ringing guitars and organ. It reached #23 on Billboard's Top...
  
  
• Pack Up The Plantation: Live!
  Pack up the Plantation: Live!
  Pack Up the Plantation: Live! is the first live album by Tom Petty and the Heartbreakers, released in November 1985. It was primarily recorded at the Wiltern Theatre during their 1985 tour but also includes several tracks from previous tours...
  
  
• Greatest Hits
  Greatest Hits (Tom Petty album)
  Greatest Hits is a compilation album by Tom Petty and the Heartbreakers, released in 1993. It is Petty's best selling album to date and was certified 10x Platinum by the RIAA on November 13, 2003. The single "Mary Jane's Last Dance" became one of Petty's most popular songs reaching #14 on the...
  
  
• Playback
  Playback (Tom Petty and the Heartbreakers box set)
  Playback is a box set compilation by Tom Petty and the Heartbreakers, released in 1995. It contains popular album tracks, B-sides, previously unreleased outtakes, and early songs by Petty's previous band Mudcrutch....
  
  
• Anthology: Through The Years
  Anthology: Through The Years
  Anthology: Through the Years is a double compilation album featuring the best of Tom Petty and the Heartbreakers. It contains a new song, "Surrender", written by Petty during the You're Gonna Get It! sessions, but recorded in 2000 especially for this release...
  
  
• The Live Anthology
  The Live Anthology
  The Live Anthology is a live box set by American rock band Tom Petty and the Heartbreakers. The box set was released by Reprise Records on November 23, 2009, in a number of formats, with the standard CD and download formats, composed of 48 tracks .The album's cover artwork and packaging was...
  
  
• This song is part of the soundtrack in Rock Band 3
  Rock Band 3
  Rock Band 3 is a music video game, developed by Harmonix Music Systems. The game was initially published and distributed by MTV Games and Electronic Arts, respectively, with Mad Catz taking over both roles a year later. It is the third main game in the Rock Band series...
  
  .

Charts

Chart (1978)	Peak position
U.S. Billboard Hot 100	41
Canadian RPM Top Singles	46