Alanis Morissette

Context: Morissette was featured as a guest vocalist on Ringo Starr's cover of "Drift Away" on his 1998 album, Vertical Man, and on the songs "Don't Drink the Water" and "Spoon" on the Dave Matthews Band album Before These Crowded Streets. She recorded the song "Uninvited" for the soundtrack to the 1998 film City of Angels. Although the track was never commercially released as a single, it received widespread radio airplay in the U.S. At the 1999 Grammy Awards, it won in the categories of Best Rock Song and Best Female Rock Vocal Performance, and was nominated for Best Song Written for a Motion Picture, Television or Other Visual Media. Later in 1998, Morissette released her fourth album, Supposed Former Infatuation Junkie, which she wrote and produced with Glen Ballard.  Privately, the label hoped to sell a million copies of the album on initial release; instead, it debuted at number one on the Billboard 200 chart with first-week sales of 469,000 copies--a record, at the time, for the highest first-week sales of an album by a female artist. The wordy, personal lyrics on Supposed Former Infatuation Junkie alienated many fans, and after the album sold considerably less than Jagged Little Pill (1995), many labelled it an example of the sophomore jinx. However, it received positive reviews, including a four-star review from Rolling Stone. In Canada, it won the Juno Award for Best Album and was certified four times platinum. "Thank U", the album's only major international hit single, was nominated for the 2000 Grammy Award for Best Female Pop Vocal Performance; the music video, which featured Morissette nude, generated mild controversy. Morissette herself directed the videos for "Unsent" and "So Pure", which won, respectively, the MuchMusic Video Award for Best Director and the Juno Award for Video of the Year. The "So Pure" video features actor Dash Mihok, with whom Morissette was in a relationship at the time.  Morissette contributed vocals to "Mercy", "Hope", "Innocence", and "Faith", four tracks on Jonathan Elias's project The Prayer Cycle, which was released in 1999. The same year, she released the live acoustic album Alanis Unplugged, which was recorded during her appearance on the television show MTV Unplugged. It featured tracks from her previous two albums alongside four new songs, including "King of Pain" (a cover of The Police song) and "No Pressure over Cappuccino", which Morissette wrote with her main guitar player, Nick Lashley. The recording of the Supposed Former Infatuation Junkie track "That I Would Be Good", released as a single, became a minor hit on hot adult contemporary radio in America. Also in 1999, Morissette released a live version of her song "Are You Still Mad" on the charity album Live in the X Lounge II. For her live rendition of "So Pure" at Woodstock '99, she was nominated for Best Female Rock Vocal Performance at the 2001 Grammy Awards. During summer 1999, Alanis toured with singer-songwriter Tori Amos on the 5 and a Half Weeks Tour in support of Amos' album To Venus and Back (1999). CANNOTANSWER

Question: What year did Alanis Morissette do a recorded appearance on the television show MTV Unplugged for her album, Alanis Unplugged?
Answer: 1999.