Question: Both Lacey Sturm and Natalie Maines have what occupation?

Context paragraphs:
Natalie Maines: Natalie Louise Maines (born October 14, 1974) is an American singer-songwriter and activist who achieved success as the lead vocalist for the female alternative country band the Dixie Chicks.  Born in Lubbock, Texas, Maines considers herself a rebel who "loved not thinking in the way I knew the majority of people thought."

Travelin' Soldier: "Travelin' Soldier" is a song written and originally recorded by American country music artist Bruce Robison in 1996 and again, in rewritten form, in 1999.  It was later recorded by Ty England on his 1999 album, "Highways & Dance Halls".  The first rendition to be issued as a single was by the Dixie Chicks in December 2002, from their album "Home".  It became the group's sixth and final single to reach No. 1 on "Billboard" "Hot Country Singles & Tracks" (now "Hot Country Songs").  A version of the song featuring Natalie Maines of the Dixie Chicks, Bruce Robison and Robison's wife, Kelly Willis, appears on "KGSR's Broadcasts Vol.  13" album.  Aaron Lewis also recorded a cover of the song as a duet with his daughter Zoe on his 2016 album "Sinner".

Protesting the Dixie Chicks: Protesting the Dixie Chicks is a documentary by American filmmaker Christopher Fleeger, independently released on DVD in 2006.  The film captures the storm of controversy ignited by the remarks of Natalie Maines, lead singer of the Texas pop-country trio the Dixie Chicks.  On March 10, 2003, Natalie Maines, at a concert in London, stated that her group was "ashamed" to be from the same state as President George W. Bush.  In the man-on-the-street style of "Heavy Metal Parking Lot", anonymous fans and protesters are interviewed outside the arenas of the Dixie Chicks 2003 USA tour, while the context of the drama is reenacted with toys and action figures of Natalie Maines, Toby Keith, General John Abizaid, Senator Richard Lugar, Senator John McCain and President George W. Bush.

I Can Love You Better: "I Can Love You Better" is the title of a debut song written by Pamela Brown Hayes and Kostas, and recorded by American country music group Dixie Chicks.  It was released in October 1997 as the first single from their 1998 album "Wide Open Spaces", and was the first hit of the Natalie Maines era of the group.

Life Screams: Life Screams is the debut solo studio album by the American singer Lacey Sturm.  It was released on February 12, 2016 through Followspot Records.  The album has sold 9,000 copies in the United States.

Between the Stars: Between the Stars is the fourth full-length studio album by American rock band Flyleaf.  The album was released on September 16, 2014 through Loud & Proud Records.  The group funded the album through PledgeMusic.  It marks the group's first and only record to feature Kristen May on vocals, who replaced original vocalist Lacey Sturm who exited the band in 2012.  May exited the band in 2016.  It is the group's first album to be recorded by producer Don Gilmore.  Studio recording was completed in Los Angeles, CA.  The album's lead single "Set Me on Fire" debuted on July 1, 2014 at Revolver.

New Horizons (Flyleaf album): New Horizons is the third full-length studio album by American rock band Flyleaf, released on A&M/Octone Records on October 30, 2012.  It was produced by Howard Benson, who has produced several of Flyleaf's previous recordings.  It is the final album with lead vocalist Lacey Sturm, who announced her departure from the band, just prior to the album's release, in October 2012.

Dixie Chicks: Dixie Chicks are an American country music band which has also crossed over into other genres, including pop and alternative country.  The band is composed of founding members (and sisters) Martie Erwin Maguire and Emily Erwin Robison, and lead singer Natalie Maines.  The band formed in 1990 in Dallas, Texas, and was originally composed of four women performing bluegrass and country music, busking and touring the bluegrass festival circuits and small venues for six years without attracting a major label.  After the departure of one bandmate, the replacement of their lead singer, and a slight change in their repertoire, Dixie Chicks soon achieved commercial success, beginning in 1998 with hit songs "There's Your Trouble" and "Wide Open Spaces".

Lacey Sturm: Lacey Nicole Sturm (née Mosley, born September 4, 1981) is an American singer and songwriter from Homestead, Florida, raised in Arlington, Texas.  She is co-founder and former lead vocalist of the hard rock band Flyleaf.  In February 2016, Sturm became the first solo female to top the "Billboard" Hard Rock Albums chart with her debut release.

Lubbock High School: Lubbock High School is a 5A high school serving grades nine to twelve in Lubbock, Texas (USA).  Part of the Lubbock Independent School District, the school is known for its academic program and for the fact that it has produced a number of talented musicians, vocalists, businessmen, and scientists over the years (including Buddy Holly and The Crickets, Natalie Maines, Ralna English, and Mac Davis).

Supporting paragraphs: Lacey Sturm Natalie Maines
Answer: American singer-songwriter