Question: Are both Chrissy Amphlett and Jimi Jamison songwriters?

Context paragraphs:
When Seconds Count: When Seconds Count is the sixth album by the American rock band Survivor, released in October 1986.  It is the second album featuring vocalist Jimi Jamison.  The album included the hit single, "Is This Love", which peaked at #9 in the US on the "Billboard" Hot 100 chart in early 1987.  The album reached #49 on the "Billboard" 200 album chart.

Divinyls: Divinyls (often incorrectly referred to as The Divinyls) was an Australian rock band that was formed in Sydney in 1980.  The band primarily consisted of vocalist Chrissy Amphlett and guitarist Mark McEntee.  Amphlett garnered widespread attention for performing on stage in a school uniform and fishnet stockings, and often used an illuminated neon tube as a prop for displaying aggression towards both band members and the audience.

I Can't Hold Back: "I Can't Hold Back" is a song recorded by the rock band Survivor.  It was the first hit single from their 1984 album "Vital Signs" (their first album with vocalist Jimi Jamison).  The song peaked at #13 in December 1984 on the "Billboard" Hot 100 chart.  It also peaked at #1 for three weeks on the "Billboard" Top Rock Tracks chart.

Vital Signs (Survivor album): Vital Signs is the fifth studio album by American rock band Survivor and their first with vocalist Jimi Jamison.  The album was their second most successful in the U.S., reaching #16 on the Billboard Album charts and being certified platinum by the RIAA.  This album includes the singles "I Can't Hold Back", "High on You", "The Search Is Over" and "First Night."

Hybrid Ice: Hybrid Ice is a rock band from Danville, Pennsylvania, most notable for its song "Magdelene" released on the album "Hybrid Ice" in 1982, which became a radio hit at the time.  "Magdelene" was later covered by Boston on their 1994 album "Walk On".  In 1984, with two sold out shows, Hybrid Ice was the first rock band ever to play at the Bloomsburg Fair.  Hybrid Ice has toured with many notable musical acts, such as Foreigner, Kansas, Joan Jett, Bad Company, The Beach Boys, Steppenwolf, The Edgar Winter Group, Ted Nugent, and Lita Ford, as well as several others.  More recently they have played with Jimi Jamison of Survivor, John Cafferty of the Beaver Brown Band, Derek St.Holmes of the Ted Nugent band, and Kevin Chalfant of the Journey Experience.  And have played the "Legends of Rock" Cruise for 2015-17.

Too Hot to Sleep: Too Hot to Sleep is the seventh album from rock band Survivor, released in 1988.  It was a relative commercial disappointment, reaching only #187 on the Billboard album charts, though "Across The Miles" is one of their biggest AC chart hits.  After this album, founders Frankie Sullivan and Jim Peterik put the band on indefinite hiatus, while lead vocalist Jimi Jamison would continue to tour under the Survivor name (thus resulting in a lengthy court battle regarding rights to the name).  Drummer Marc Droubay and bassist Stephen Ellis were replaced by studio musicians on the album.  The lineup of Sullivan and Jamison would not reunite until 2000.

Serial Thriller: "Serial Thriller" is a song written by Christina Amphlett and performed by Australian singer Brielle Davis.  "Serial Thriller" is Davis's first charting CD single, debuting on the ARIA charts in July 2006 at number forty-four and number twenty-one on the ARIA Club, the song has a rock/beat influence which was a big contrast to her older material.  Serial Thriller was written by Chrissy Amphlett from The Divinyls.  This tear out release features remixes from mrTimothy, Moneyshott, Jimmy Z & Sam Gee, and Wayne G & Porl Young.

Chrissy Amphlett: Christine Joy "Chrissy" Amphlett ( ; 25 October 1959 – 21 April 2013) was an Australian singer, songwriter and actress who was the frontwoman of the Australian rock band Divinyls.

Burning Heart (song): "Burning Heart" is a song by Survivor.  It was sung by Jimi Jamison and appeared in the 1985 film "Rocky IV" and on its soundtrack album.  The single peaked at number 2 on the "Billboard" Hot 100 for two weeks in February 1986, behind "That's What Friends Are For" by Dionne and Friends.

Jimi Jamison: Jimmy Wayne "Jimi" Jamison (August 23, 1951 – September 1, 2014) was an American musician, singer, and songwriter.  He had previously been the frontman of the platinum-selling rock band Survivor between 1984–89, 2000–06 and from 2011 until his death.  Jamison is also known for writing and performing "I'm Always Here", the theme song for the TV series "Baywatch".

Supporting paragraphs: Chrissy Amphlett Jimi Jamison
Answer: yes