Lane was pronounced dead by Fire Department personnel who responded to a call shortly before 5:30 p.m. in the Comfort Inn in the 20100 block of Ventura Boulevard in Woodland Hills, California, the Los Angeles Police Department said.

The cause of death was unknown, and the case was turned over to the Los Angeles county coroner's office, LAPD officer Sara Faden told the Los Angeles Times.

On July 23, Lane took part in a taping of an upcoming episode of the "That Metal Show" alongside Michael Sweet (STRYPER) and Taime Downe (FASTER PUSSYCAT) (see photos below). The program featuring Lane is scheduled to air on October 1 on VH1 Classic.

Nikki Sixx (MÖTLEY CRÜE, SIXX: A.M.): "I just heard the sad news about Jani Lane. So hard to swallow when people have kids. RIP."

Michael Sweet (STRYPER): "My heart, thoughts and prayers go out to the family and friends of Jani Lane. Had the pleasure of meeting him on 'That Metal Show' and he was a great guy."

Steven Adler (GUNS N' ROSES, ADLER'S APPETITE): "Jani Lane, you were a great talent. The world will miss you. R.I.P. my brother."

Glenn Hughes (DEEP PURPLE, BLACK COUNTRY COMMUNION, BLACK SABBATH): "[Rest in peace] Jani Lane... another one lost. . . We must remember that the unlucky ones who lose their life to alcohol and drugs, are those that could not completely surrender. Sad day."

Mark Slaughter (SLAUGHTER): "Fly to the angels, Jani. RIP my friend."

Eddie Trunk (VH1 Classic's "That Metal Show"): "My God, Jani Lane found dead. Just saw him and he is in the new season of 'That Metal Show'. I am stunned. So sad. . . Just had a great time with him in L.A. RIP. Another talent gone way too soon."

Chris Jericho (FOZZY): "Sad to hear about the passing of Jani Lane. Jani was a good guy and one of the best songwriters in the late '80s. 'Dog Eat Dog' — very underrated."

Bret Michaels (POISON): "We'd like to offer our deepest condolences to the family of Jani Lane regarding their loss."

Jamey Jasta (HATEBREED, KINGDOM OF SORROW): "Sad news about Jani Lane. 47 is too young to go."

Dito Godwin (multi-platinum-award-winning producer who has previously worked with MÖTLEY CRÜE, Peter Criss, Ace Frehley and GREAT WHITE, among others): "I've been working with Jani Lane over the last few months putting songs together in an effort to supply some of my clients with his incredible songs as well as putting a record together for him to possibly release on my label. His passing has shocked and saddened me to the point of tears. A great person whose talent was far greater than most people will ever know. I produced a number of songs for his solo project in the late '90s. My connection with Jani as artist and producer was textbook perfect. Upon completion of those sessions, we both said it was a mind-blowing experience to work together and we would do it again, [and] we did. The world will truly miss Jani Lane. I'm so lucky to have been a small part of his life. RIP Jani. I'm numb!!"

TRIXTER: "Thoughts and prayers for Jani Lane's family and friends. Jani will be missed. Heaven isn't too far away..."

BLACK TIDE: "RIP Jani Lane, you were such a huge inspiration, and you will be missed greatly. It was an honor to meet you."

Zach Myers (SHINEDOWN): "Terrible news about Jani Lane. Life is fragile, people ....Help somebody every chance you get..."

Wednesday 13 (MURDERDOLLS): "Just heard, so sad...former WARRANT singer Jani Lane dead At 47, R.I.P."

Stephen Pearcy (RATT): "Sad to hear today. R.I.P. Jani Lane."

In February, Lane (born John Kennedy Oswald on February 1, 1964) canceled all of his previously announced solo tour dates two days before the first show was due to take place. No explanation was offered for the cancelation.

WARRANT announced in September 2008 that it was splitting with Lane six months after the band reunited with the troubled vocalist. He has since been replaced by Robert Mason (LYNCH MOB, CRY OF LOVE, BIG COCK).

Lane originally left WARRANT in March 1993 but rejoined the band in September 1994. The group went on to record the "Ultraphobic" (1995), "Belly To Belly" (1996) and "Greatest & Latest" (1999) albums and issued and collection of covers, "Under The Influence", in 2001. Jani quit WARRANT again in 2004 before reuniting with the group four years later.

Lane released a solo album, "Back Down to One", in 2003, but shortly after was admitted to a rehab center for alcohol and drug-related exhaustion. He also appeared on VH1's reality series "Celebrity Fit Club".