Karaoke Revolution Volume 2 is the second in the line of video games developed by Harmonix Music Systems and Blitz Games and published by Konami in its Bemani line of music games.
The game does not attempt to understand the singer's words, but instead detects their pitch. As such, singers can hum to a song or sing different lyrics without penalty. The game adapts to the player singing in a different octave than the song, to accommodate players whose vocal ranges do not fit the song.
Karaoke Revolution Volume 2 features the following songs:
"...Baby One More Time" - Britney Spears
"Born to Be Wild" - Steppenwolf
"Cry" - Faith Hill
"Drift Away" - Uncle Kracker
"Every Breath You Take" - The Police
"Friends in Low Places" - Garth Brooks
"Genie in a Bottle" - Christina Aguilera
"Heartbreak Hotel" - Elvis Presley
"Here Without You" - 3 Doors Down
"Hot Stuff" - Donna Summer
"I Believe in a Thing Called Love" - The Darkness
"I Hate (Everything About You)" - Three Days Grace
"I Will Survive" - Gloria Gaynor
"Irresistible" - Jessica Simpson
"It's My Life" - No Doubt
"I'll Make Love to You" - Boyz II Men
"I'm With You" - Avril Lavigne
"I've Got You Under My Skin" - Frank Sinatra
"Jessie's Girl" - Rick Springfield
"Lady Marmalade" - Patti LaBelle
"Let's Get It On" - Marvin Gaye
"Miss You" - Aaliyah
"My Girl" - The Temptations
"Papa Don't Preach" - Madonna
"Perfect" - Simple Plan
"Rich Girl" - Hall & Oates
"Rock and Roll All Nite" - KISS
"(Sittin' on) the Dock of the Bay" - Otis Redding
"Sweet Home Alabama" - Lynyrd Skynyrd
"The First Cut Is the Deepest" - Sheryl Crow
"The Joker" - Steve Miller Band
"Toxic" - Britney Spears
"Virtual Insanity" - Jamiroquai
"We Are Family" - Sister Sledge
"White Flag" - Dido
Source: Wikipedia, "Karaoke Revolution", available under the CC-BY-SA License.