Question: The This Is What the Truth Feels Like Tour concluded at an arena that opened in what year?

Context paragraphs:
Rare (song): "Rare" is a song recorded by American singer and songwriter Gwen Stefani from her third studio album, "This Is What the Truth Feels Like" (2016).  It was released on March 18, 2016, along with the rest of "This Is What the Truth Feels Like" by Interscope Records.  The track was written by Stefani, Justin Tranter, Julia Michaels, and Greg Kurstin; Kurstin was the track's sole producer.

The Forum (Inglewood, California): The Forum is a multi-purpose indoor arena in Inglewood, California, adjacent to Los Angeles.  Located between West Manchester Boulevard, across Pincay Drive and Kareem Court, it is north of the under-construction Los Angeles Stadium at Hollywood Park and the new Hollywood Park Casino.  It is about three miles east of Los Angeles International Airport.  Opening on December 30, 1967, the Forum was an unusual and groundbreaking structure.  Architect Charles Luckman's vision was brought to life by engineers Carl Johnson and Svend Nielsen, who were able to engineer the structure so that it had no major support pillars.  This had previously been unheard of in an indoor arena the size of the Forum.

This Is What the Truth Feels Like: This Is What the Truth Feels Like is the third studio album recorded by American singer and songwriter Gwen Stefani.  It was released on March 18, 2016 by Interscope Records.  Initially, the album was scheduled to be released in December 2014 with Stefani working with a handful of high-profile producers, and Benny Blanco serving as executive producer.  However, after the underperformance of her 2014 singles and the writer's block Stefani suffered, she did not feel comfortable curating an album and scrapped the whole record in favor of starting again.  The album's release was scheduled after Stefani hinted at it on her Twitter account.

This Is What the Truth Feels Like Tour: The This Is What the Truth Feels Like Tour was the third solo concert tour by American singer-songwriter Gwen Stefani, in support of her third solo studio album, "This Is What the Truth Feels Like" (2016).  It began on July 12, 2016, in Mansfield, Massachusetts at the Xfinity Center and continued throughout North America before concluding on October 16, 2016, in Inglewood, California at The Forum.

Gwen Stefani: Gwen Renée Stefani ( ; born October 3, 1969) is an American singer, songwriter, fashion designer, actress, and television personality.  She is a co-founder and the lead vocalist of the band No Doubt that experienced major success after their breakthrough studio album "Tragic Kingdom" (1995) along with various successful singles, including "Just a Girl", "Don't Speak", "Hey Baby", and "It's My Life".  During the band's hiatus, Stefani embarked on a solo pop career in 2004 by releasing her debut studio album "Love.  Angel.  Music.  Baby. " Inspired by pop music from the 1980s, the album was met with both critical and commercial success.  It spawned three commercially successful singles: "What You Waiting For? ", "Rich Girl", and "Hollaback Girl", the latter reached number one on the "Billboard" Hot 100 while also becoming the first US download to sell one million copies.  In 2006 Stefani released her second studio album "The Sweet Escape".  The album produced two successful singles: "Wind It Up" and the album's title track "The Sweet Escape".  Her third solo album "This Is What the Truth Feels Like" was released in March 2016 and became her first solo number-one album on the "Billboard" 200.

Misery (Gwen Stefani song): "Misery" is a song recorded by American singer Gwen Stefani for her third solo studio album, "This Is What the Truth Feels Like" (2016).  Initially released as a promotional single, it became the record's third and final single on May 23, 2016, when it was sent to hot adult contemporary radio.  Stefani co-wrote the song with Justin Tranter, Julia Michaels, Mattias Larsson, and Robin Frediksson, with the latter two serving as the producers.  An electropop song, "Misery" uses digital hand clapping and an upbeat samba to produce a futuristic-sounding melody.  The lyrics describe a lover who has recently started a relationship and is confused over what to think about it.  Several critics drew comparisons between these lyrics to Stefani's personal and romantic life with her boyfriend, Blake Shelton.

Make Me Like You: "Make Me Like You" is a song by American singer Gwen Stefani for her third solo studio album, "This Is What the Truth Feels Like" (2016).  The record's second single, it was released digitally on February 12, 2016, and distributed to contemporary hit radio on February 16 in the United States by Interscope.  Mattias Larsson and Robin Frediksson produced the song, which was co-written by Stefani, Larsson, Frediksson, Justin Tranter, and Julia Michaels.  A pop and disco recording, "Make Me Like You" incorporates light rock, with guitars and digital harps over an uptempo melody.  The lyrics, which were inspired by Stefani's relationship with singer Blake Shelton, explore finding and renewing love after a fractured relationship.

Used to Love You: "Used to Love You" is a song recorded by American singer Gwen Stefani for her third studio album, "This Is What the Truth Feels Like" (2016).  It was written by Stefani, Justin Tranter, Julia Michaels, Jonathan "J.R." Rotem and Teal Douville, and produced by Rotem.  After scrapping the album and its two singles, "Baby Don't Lie", and "Spark the Fire", in favor to start over, Interscope Records released "Used to Love You" as the album's first official single on October 20, 2015.  It was then serviced to mainstream radio on October 27, 2015.

Asking 4 It: "Asking 4 It" is a song by American singer and songwriter Gwen Stefani from her third studio album, "This Is What the Truth Feels Like" (2016).  The song features guest vocals from American rapper Fetty Wap.  It was released on March 18, 2016, as the ninth track on "This Is What the Truth Feels Like" by Interscope Records.  The track was written by Stefani, Justin Tranter, Julia Michaels, Tor Hermansen, Mikkel Eriksen, and Fetty Wap.  The track's production was handled by Stargate, while additional production was made by Tim Blacksmith and Danny D.

Fatima Robinson: Fatima Robinson is a music video director and choreographer.  Robinson has choreographed music videos for artists such as Michael Jackson ("Remember the Time"), Aaliyah ("Rock The Boat", "Hot Like Fire", "Try Again", "We Need A Resolution", "Are You That Somebody", "More Than a Woman") and Mary J. Blige's "Family Affair" (for which Robinson won the 2002 MTV Video Music Award for Best Choreography); and directed the "Hey Mama" and "My Humps" videos by The Black Eyed Peas (the latter co-directed by Malik Hassan Sayeed and the recipient of the 2006 MTV Video Music Award for Best Hip-Hop Video) and "All About That Bass" & "Dear Future Husband" by Meghan Trainor.  Robinson's most recent choreography credits include Fergie's "MILF $" music video as well as Gwen Stefani's "This Is What The Truth Feels Like" Summer 2016 tour.

Supporting paragraphs: This Is What the Truth Feels Like Tour The Forum (Inglewood, California)
Answer: 1967