Some context: Lisa Marie Simpson is a fictional character in the animated television series The Simpsons. She is the middle child and most intelligent of the Simpson family. Voiced by Yeardley Smith, Lisa was born as a character in The Tracey Ullman Show short "Good Night" on April 19, 1987. Cartoonist Matt Groening created and designed her while waiting to meet James L. Brooks.
In The Tracey Ullman Show shorts, Lisa was something of a "female Bart": equally mischievous but lacking unique traits. As the series progressed, Lisa began to develop into a more intelligent and more emotional character. She demonstrates her intellect in the 1990 episode "Krusty Gets Busted" (season one), by helping Bart reveal Sideshow Bob's plot to frame Krusty the Clown for armed robbery. Many episodes focusing on Lisa have an emotional nature, such as "Moaning Lisa" (season one, 1990). The idea for the episode was pitched by James L. Brooks, who wanted to do an emotional episode involving Lisa's sadness, to complement the many "jokey episodes" in the first season.  In the seventh-season episode "Lisa the Vegetarian" (1995), Lisa permanently becomes a vegetarian, distinguishing her as one of the first primetime television characters to make such a choice. The episode was written by David S. Cohen (in his first solo writing credit) who jotted down the idea one day while eating lunch. Then-executive producer David Mirkin, who had recently become a vegetarian, quickly approved the idea. Several of Lisa's experiences in the episode are based on Mirkin's own experiences. The episode guest stars musician Paul McCartney, a committed vegetarian and animal rights activist. McCartney's condition for appearing was that Lisa would remain a vegetarian for the rest of the series and would not revert the next week (as is common on situation comedies). The trait stayed and is one of the few permanent character changes made in the show. In the season 13 episode "She of Little Faith" (2001), Lisa underwent another permanent character change when she converted to Buddhism.  Lisa plays the baritone saxophone, and some episodes use that as a plot device. According to Matt Groening, the baritone saxophone was chosen because he found the thought of an eight-year-old girl playing it amusing. He added, "But she doesn't always play a baritone sax because the animators don't know what it looks like, so it changes shape and color from show to show." One of the hallmarks of the show's opening sequence is a brief solo Lisa plays on her saxophone after being thrown out of music class. The Simpsons composer Alf Clausen said that the session musicians who perform her solos do not try to play at the second grade level and instead "think of Lisa as a really good player."
who does the episode guest stars
A: guest stars musician Paul McCartney,

Some context: A Hakka, Kate Tsui was born and raised in Hong Kong. Her father works in logistics, and while her mother is now a homemaker, she was a dancer when she was younger. Tsui also has an older sister, who is married with two kids. As of 2014, Tsui has expressed that with the exception of herself, her entire immediate family now resides in Taiwan.
Aside from her development in television acting, Tsui also experienced success in developing her career in the film industry. In 2007, through a series of auditions, Tsui was cast as the female lead, alongside A-list actors Tony Leung Ka-fai and Simon Yam, in Eye in the Sky, which is a film produced by Johnnie To and directed by Yau Nai-hoi. With her performance in the film,  Eye in the Sky was praised by professional Hong Kong film critic, Sek Kei, as the best Hong Kong film in the first half of 2007. The film was subsequently entered into the Berlin International Film Festival, as well as the Shanghai International Film Festival. Through her performance in the film, Tsui was widely acclaimed to be talented in acting and a rising actress worth looking out for.  With her performance in Eye in the Sky, Tsui earned the Best Newcomer - Gold Award from Hong Kong Film Directors' Guild 2007, as well as Hong Kong Film Award for Best New Performer from the 27th Hong Kong Film Awards, held in 2008. The latter is a particularly outstanding achievement, for Tsui is, so far, the only individual to have received a Hong Kong Film Award, while being fully contracted by TVB, since Anita Yuen, who coincidentally is also a Miss Hong Kong pageant winner, won the same award back in 1993.  Professional Taiwanese film critic, Mai Ruoyu, had openly criticized the Golden Horse Film Festival and Awards, a film festival and awards ceremony held in Taiwan, for excluding Tsui and her performance in Eye in the Sky from a nomination in the Best New Performer category. He had further praised that Tsui has the most potential and talent in acting among all of TVB's Miss Hong Kong-turned-actresses, since Maggie Cheung.
What happened in 2007?
A:
Tsui was cast as the female lead, alongside A-list actors Tony Leung Ka-fai and Simon Yam, in Eye in the Sky,