A pet door or pet flap (also referred to in more specific terms, such as cat flap, cat door, dog door, or doggie door) is a small portal in a wall, window or human door to allow pets to enter and exit a house (or other structure) on their own without needing a person to open the door.
 Originally simple holes, the modern form is a hinged and often spring-loaded panel or flexible flap, and some are electronically controlled.
 They offer a degree of protection against wind, rain, and larger-bodied intruders entering the dwelling.
 Similar hatches can let dogs through fences at stiles.
 A related concept is the pet gate, which is easy for humans to open but acts as a secure pet barrier, as well as the automated left- or right-handed pet doors.
"Weight of the World" is a song by American rock band Evanescence, from their second studio album, "The Open Door" (2006).
 It was released as a promotional single in October 2007 to the country of Colombia.
 It was written by Amy Lee and Terry Balsamo while the production was handled by Dave Fortman, and Lee wrote it about the pressure fans put on her.
 "Weight of the World" received positive reception from music critics, who praised the song for its heaviness.
 The song was added to the set list on Evanescence's The Open Door Tour (2006–07) and Evanescence Tour (2011–12).
"Sweet Sacrifice" is a song by American rock band Evanescence.
 It was released on May 25, 2007, as the third single from their second studio album, "The Open Door".
 It was written by Amy Lee and Terry Balsamo while the production was handled by Dave Fortman.
 "All That I'm Living For" was initially planned to be the third single, as announced at live concerts and online.
 However, due to requests from the band and fan reaction, Wind-up reconsidered its release and announced that "Sweet Sacrifice" would be the band's third single from "The Open Door".
 Evanescence's lead singer Amy Lee wrote the song about the abusive relationship that inspired all of the songs on the group's debut record "Fallen" (2003).
The Best of Pete Townshend is a compilation album by Pete Townshend released in 1996.
 It was released in the UK on the Virgin label, and the US on Atlantic.
 The compilation included songs from Pete Townshend's solo career as well as two songs from the album Rough Mix with Ronnie Lane.
 It also included the single edit of English Boy" and the first appearance of "Let My Love Open the Door (E. Cola Mix)" and the Psychoderelict outtake, "Uneasy Street".
Peter Dennis Blandford Townshend (born 19 May 1945) is an English musician, singer, songwriter, and multi-instrumentalist, best known as the lead guitarist, backing vocalist, and main songwriter for the rock band the Who.
 His career with the Who spans over 50 years, during which time the band grew to be considered one of the most influential bands of the 20th century.
"Let My Love Open the Door" is a song written and performed by Pete Townshend from his 1980 album "Empty Glass".
 It reached the top ten in the United States in that same year, reaching number nine.
 It reached number five in Canada.
Sam and Nia are YouTube vloggers based out of Terrell, Texas who vlog about their daily life as a Christian family.
 They have over 100 videos that exceed one million views, eight videos with over 10 million views, and three that have over 20 million views.
 They first rose to prominence when they made a video of themselves lip-syncing to the song "Love Is An Open Door" from Frozen (2013 film) titled "Good Looking Parents Sing Disney's Frozen (Love Is an Open Door)".
 The video was an instant success and went viral in march of 2014, it currently has over 22 million views.
Let There Be Love is Joni James debut album, recorded in 1953 and released by MGM Records at the end of the year.
 It was released in a four-disc 10-inch 78-rpm record box, in both a two-disc 7-inch 45-rpm extended-play foldout album and a four-disc 45-rpm regular-play box and on a 10-inch 33⅓-rpm album.
 The serial number, 222, coincidentally included James's lucky number, "22," which appeared in many of her record serial numbers all over the world.
 The album is the first to present its songs as a book in music, opening with "Let There Be Love" and closing with "I'll Be Seeing You", with the songs telling a story start to finish.
 The memorable cover was done at M-G-M Pictures Studios in Culver City by artist Russ Gale.
 From the album a single of "Let There Be Love" and "You're Nearer" was shipped to radio stations.
 Then, by public demand, a single of "You're My Everything" and "You're Nearer" was released.
 This album offered Joni's second recording of "Let There Be Love," which had been released in an earlier version in 1952 as her first single on Sharp Records in Chicago, then going to M-G-M Records for further distribution.
 Both recordings were arranged and conducted by Lew Douglas.
 "Let There Be Love" went to the top of the album charts and was the sixth-best-selling album of 1953.
 In 1956 the album was reissued as a 12-inch L.P. and in three single EPs; there was no EP set including the entire album.
 For this release, four Joni James singles were added, but one of them had never been released.
 That was "I Need You Now," which was to have followed the hit "My Love, My Love" but was canceled when Eddie Fisher came out with a version recorded several weeks after Joni's.
 M-G-M had expected Joni's original version to go straight to #1.
 For the new album the first four songs and second four songs were switched to get "You're My Everything" in the outside groove of the L.P. to facilitate disc jockey play.
 So, for 50 years, the story the album tells has been garbled.
 In 1961 the album got new cover art, a new serial number (E3931), and an electronically simulated stereo release.
 Released again on compact disk with yet more bonus tracks, the album is in its fifth decade as a best seller.
 Joni James hopes for yet another release which will restore the original song order.
 Significantly, for her last M-G-M album, "Bossa Nova Style", Joni included new recordings of several songs from "Let There Be Love", including a new single of "You're Nearer."
 That album was arranged by Lew Douglas's protégé Chuck Sagle.
 This information comes from Wayne Brasler, longtime President of the Joni James International Fan Club and the writer of the album notes for all Joni James' CD releases.
The Magic Door is the second studio album by American blues rock band Chris Robinson Brotherhood.
 It was released on 11 September 2012.
 It was recorded at the same time as their previous album, "Big Moon Ritual", and features a cover of Hank Ballard's "Let's Go, Let's Go, Let's Go", which the band has frequently performed live.
 "Appaloosa" and "Little Lizzie Mae" are versions of recent Black Crowes songs (from "Before the Frost...Until the Freeze" and "Cabin Fever", respectively), and "Someday Past the Sunset" was previously released on the Robinson brothers' live album, "".
"Love Is an Open Door" is a song written by Kristen Anderson-Lopez and Robert Lopez for Walt Disney Animation Studios's 53rd animated feature film "Frozen" (2013).
 Performed by Kristen Bell and Santino Fontana as Anna and Prince Hans respectively, "Love Is an Open Door" is a romantic duet which takes place during the first act of the film, when Anna meets Hans during the reception of her sister Elsa's coronation.
 The song was intended by Lopez and Anderson-Lopez to "feel like the perfect first date", inspired by the date depicted in the film "The Karate Kid" (1984).

Question: What band does the author of the song, "Let My Love Open The Door," play in?
Answer: the Who