Question: Who was the host of A-List Listings who is known for dating and later marrying Neil Patrick Harris?

Context articles: Best Time Ever with Neil Patrick Harris
Too Good to Be True (film)
66th Tony Awards
63rd Tony Awards
87th Academy Awards
67th Tony Awards
Brain Games (National Geographic)
Prediction Productions
A-List Listings
David Burtka

Best Time Ever with Neil Patrick Harris (or Best Time Ever) was an American live television variety series adaptation of the British variety series "Ant & Dec's Saturday Night Takeaway".
 The one-hour show is hosted and executive-produced by Neil Patrick Harris featuring Nicole Scherzinger as a co-host.
 The series aired on NBC from September 15, to November 3, 2015.
 On December 15, 2015, it was announced that the show had been cancelled after one season.
Too Good to Be True is a 1988 American television film starring Loni Anderson, Patrick Duffy, Daniel Baldwin, Glynnis O'Connor, Larry Drake, Neil Patrick Harris, James Sikking, and Julie Harris.
 It was adapted for the small screen by Timothy Bradshaw, based on the novel "Leave Her to Heaven" by Ben Ames Williams and was directed by Christian I. Nyby II.
 After John M. Stahl's "Leave Her to Heaven", this is the second film adaption of Williams' book.
The 66th Annual Tony Awards was held on June 10, 2012, to recognize achievement in Broadway productions during the 2011–2012 season.
 The ceremony was held at the Beacon Theatre, and was broadcast live on CBS television, with Neil Patrick Harris as the host.
The 63rd Annual Tony Awards, which recognized Broadway productions of the 2008-2009 season, were presented on June 7, 2009 at Radio City Music Hall in New York City.
 The ceremony was broadcast by CBS, with Neil Patrick Harris as host.
The 87th Academy Awards ceremony, presented by the Academy of Motion Picture Arts and Sciences (AMPAS), honored the best films of 2014 and took place on February 22, 2015, at the Dolby Theatre in Hollywood, Los Angeles beginning at 5:30 p.m. PST / 8:30 p.m. EST.
 During the ceremony, AMPAS presented Academy Awards (commonly referred to as Oscars) in 24 categories.
 The ceremony was televised in the United States by ABC, produced by Neil Meron and Craig Zadan and directed by Hamish Hamilton.
 Actor Neil Patrick Harris hosted the ceremony for the first time.
The 67th Annual Tony Awards were held June 9, 2013, to recognize achievement in Broadway productions during the 2012–13 season.
 The ceremony returned to Radio City Music Hall in New York City, after two years at Beacon Theatre, and was broadcast live on CBS television.
 Neil Patrick Harris hosted for the third consecutive year, his fourth time as host.
 Awards in four of the eight acting categories, (Best Actress in a Play, Best Actor in a Musical, Best Actress in a Musical, Best Featured Actor in a Play) were given to African-American performers.
 Furthermore, it is the second time in Tony history that both directing prizes went to women.
 Garry Hynes and Julie Taymor had previously won in 1998. "
Kinky Boots" had a season best 13 nominations and 6 awards.
 Cyndi Lauper, who wrote the score for "Kinky Boots", is the first solo female winner for Best Original Score.
Brain Games is a popular science television series that explores cognitive science by focusing on illusions, psychological experiments, and counterintuitive thinking.
 Neil Patrick Harris was the unseen narrator in the first season, replaced by Jason Silva for the remainder of the series as its host and presenter; in addition, sleight-of-hand artist Apollo Robbins has been a frequent consultant and illusionist guest on the show.
 The show is interactive, encouraging television viewers, often along with a handful of live volunteers, to engage in visual, auditory, and other cognitive experiments, or "brain games", that emphasize the main points presented in each episode.
 The series debuted on the National Geographic Channel in 2011 as a special.
 Its return as an original series in 2013 set a record for the highest premiere rating for any National Geographic Channel original series with 1.5 million viewers.
 Season 7 aired in early 2016.
 As of 2017, it's unknown whether or not future seasons will be announced.
Prediction Productions is Neil Patrick Harris' production company.
 It also was one of the production companies involved with Best Time Ever with Neil Patrick Harris.
 Harris has a deal with NBC to work on new projects through Prediction Productions as well.
A-List Listings is an American reality television series that debuted October 24, 2012, on E!.
 Hosted by David Burtka and Catt Sadler, the series showcases America's most exclusive and extravagant homes.
David Michael Burtka (born May 29, 1975) is an American actor and professional chef.
 He is known for his acting roles in theatre and television shows such as "How I Met Your Mother" and "The Play About the Baby".
 After his role on "How I Met Your Mother", Burtka gained media attention for dating Neil Patrick Harris, whom he later married in 2014.