1) Sierra is a Jazz female singer from Indonesia.

Sierra Soetedjo are a newcomer in the jazz world of Indonesia, who studied vocals at WAAPA (Western Australian Academy of Performing Arts). Sierra also had a guest star in Tompi's album (My Happy Life), where Sierra and Tompi duet in the song Love Letter.

Sierra's debut album titled Only One.

2) Sierra was an American Contemporary Christian music vocal trio, founded in 1992 and quickly signed to Star Song, who released their debut self-titled album in 1994. The group released four albums before breaking up in 2002.

3) Sierra Entertainment, Inc. (formerly Sierra On-Line) was a Worldwide American video game developer and publisher founded in 1979 as On-Line Systems by Ken and Roberta Williams. Based in Los Angeles, California, the company was last owned by a subsidiary of Activision Blizzard (a subsidiary of Vivendi SA) Sierra is best known today for its multiple lines of seminal graphic adventure games started in the 1980s (notably King's Quest, Space Quest and Quest for Glory), some of which proved influential in the history of video games.

4) Sierra is a folk singer-songwriter from Boston, Massachusetts.

5.)Sierra is a Japanese R&B singer who has frequently worked with Volta Masters. She released her first album Heavenly U in 2008.

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