On August 3, 2015 The Nightowls released “Highline” – the second single from "Fame Sessions". On August 27, 2015 they released "Nobody But You" as a third single. In a positive review of "Fame Sessions" on September 4, 2015, "Elmore Magazine" described their music as being based on the Aretha Franklin, Wilson Picket type of sound with a more youthful, modern spin. In a review of "Fame Sessions", "Proper Music Distribution" described their sound as being firmly rooted in the history of southern soul music and pays tribute to FAME Studios greats like Duane Allman and Percy Sledge. In September through December 2015 The Nightowls toured for the first time throughout the United States. In October 2015, The Nightowls performed at the Austin City Limits Music Festival, having been rained out in 2014. In March 2016, The Nightowls performed at the SXSW Music Festival as a Showcase Artist. In December 2015, The Nightowls recorded "Royal Sessions", a five track EP at the iconic Royal Studios in Memphis, Tennessee. In April 2016, The Nightowls went to Sun Studio in Memphis, Tennessee and taped a segment for Season 8 of the Public Broadcasting System (PBS) Television network program – Sun Studio Sessions. Season 8 began airing across the United States in January 2017. On April 18, 2016 The Nightowls released "Clean It Up (Play It By The Rules)" as a single from the EP on "Baeble Music". Describing it as a “certifiable party jam that moves your body as much as it moves the part of your brain conditioned to love old school soul.” On May 25, 2016 The Nightowls released “Right Around The Corner” as a second single from "Royal Sessions " in "Paste Magazine". In their review of the single, Vents Magazine says the band transcends the “retro” tag that described their early releases in favor of a more unique and cohesive sound that is infectious in its effervescent energy. The 3rd single, “Can’t Bring Me Down” premiered in "Glide Magazine" on June 21, 2016. The article describes The Nightowls as being able to effortlessly meld Memphis and Motown with modern pop music, making for something that even fans of more mainstream fare like Fitz and the Tantrums will enjoy. "Royal Sessions" was released on July 15, 2016.