I like to refer to this two films as 'The Sunshine Series'
Little Miss Sunshine (2006)
"The Hoover family -- a man (Greg Kinnear), his wife (Toni Collette), an uncle (Steve Carell), a brother (Paul Dano) and a grandfather (Alan Arkin) -- puts the fun back in dysfunctional by piling into a VW bus and heading to California to support a daughter (Abigail Breslin) in her bid to win the Little Miss Sunshine Contest. The sanity of everyone involved is stretched to the limit as the group's quirks cause epic problems as they travel along their interstate route."
Sunshine Cleaning (2008)
"Though they once seemed to have a bright future, life seems to be passing by the Norkowski sisters. Rose (Amy Adams), once the most popular girl in high school, is a single mom and works as a maid. Norah (Emily Blunt) still lives at home with their father (Alan Arkin) and parties all the time. When Rose's married lover tells her about the lucrative field of crime-scene cleanup, she pours all her remaining resources into her new business, and recruits the squeamish Norah to help."