Following an unauthorized internet leak, the accompanying music video was officially released on 20 September 2012, four days earlier than the intended release date. Directed by Vaughan Arnell, the clip, which has a camping festival theme, was generally well received by critics, who commended its carefree nature. Upon release, it broke the Vevo record for having the most views in a 24-hour period with 8.24 million, besting the previous record which had been set by Justin Bieber's "Boyfriend" (8.00 million). Bieber subsequently regained the record with his music video for "Beauty and a Beat" (10.6 million). One Direction performed "Live While We're Young" on televised programs and during their two major concert tours: Take Me Home Tour (2013) and Where We Are Tour (2014). The track was featured in a Pepsi television commercial for the United States and was performed on an episode of Glee. This song is the first track on Now 45.
With the lyrics "Will you still love me when I'm no longer young and beautiful?", Del Rey adds a hint of desperation which parallels the idiosyncrasies faced by the characters in F. Scott Fitzgerald's classic novel The Great Gatsby. Del Rey's dreamy vocals are draped over sedated strings and canned percussion. The soft and dreary vocals, falling in line with Del Rey's retro affectation, fits the atmosphere of the 1920s when the novel is set. The lyrics rotate around the themes of pleasing a lover, nostalgia, and the gloom of aging. The Cedric Gervais remix of the song was released on October 11, 2013.
Critical reception of "Young and Beautiful" has been fairly positive. Hip hop magazine Rap-Up called the single "haunting", while MTV called it "somber-sounding". Jason Lipshutz of Billboard called the ballad, "typically lush", paralleling the single with Del Rey's previous hits, "Video Games" and "Born to Die". Canadian journal National Post wrote "Young and Beautiful" picks up where "Video Games" left off, stating the song was relevant to the book because of "its obsession with decay and the fleeting nature of the good life certainly resonate." The journal continued to call it an "artifact" of Del Rey's consistently dark tone, adding that by the second play-through "its bald directness becomes its appeal." MTV commented that the track "falls very much in-line with what Lana Del Rey's fans have come to expect" from Del Rey. Jeff Benjamin of Fuse said the track featured "a big, sweeping ballad with piano, violins and Lana's warbly delivery." He added that "if the single takes off, perhaps the songbird can finally scrub her image clean of that 'Girl that totally f-cked [sic] up her Saturday Night Live debut' tag." Rolling Stone's Jody Rosen recognized "Young and Beautiful" as the album's centerpiece, calling it "inert" and "a drag" despite its symmetry with the album's entire theme. Finding the track restrained in comparison to her earlier work, August Brown, writing for The Los Angeles Times, called the single "clean" and "classy". "Young and Beautiful" was given a positive review by Stereogum's Tom Breihan, although he disapproved of the vapidity of the line: "make me wanna party". Nathan Ellis, writing for Far Out Magazine, praised the track for the "silky vocals" and "dulcet  tones." 2b1af7f3a8