It's Valentine's Day and love is in the air on next week's episode of 'Glee,' which features no fewer than eight song performances, most with a romantic theme, including a duet between Rachel's fathers and another Madonna cover song.

Mercedes takes on the difficult task of singing Whitney Houston's 'I Will Always Love You.' She also teams up with classmates to sign Gym Class Heroes' 'Stereo Hearts.' Artie and Rory compete for Sugar's love on this episode. Artie offers a sincere rendition of Mario's 'Let Me Love You,' while Rory sings Michael Buble's 'Home.'

A Madonna song is included for the second week in a row. While 'The Spanish Teacher' featured the 'Glee' cast singing 'La Isla Bonita' with Ricky Martin, this episode finds Quinn and Mercedes performing a medley of two songs named 'Cherish' -- Madonna's '80s pop hit and the Association's soft pop track from 1966. What, they couldn't work in Kool & the Gang's 'Cherish' as well?

Rachel's dads (yep, both of 'em) hold a dinner party and entertain with a double entendre-filled duet of Cole Porter's 'You're the Top.' Meanwhile, Mike and Tina team up on Nat King Cole's 'L-O-V-E.' The cast also delivers a rousing rendition of the B-52s' 'Love Shack.' Blaine is joined by some of the girls, and Kurt chimes in with the "Tin roof rusted!" line.

'Heart' airs on Tuesday night, Feb. 14.

'Glee' 'Heart' Episode Song List:

-Mike & Tina, 'L-O-V-E' (Nat King Cole)
-Artie, 'Let Me Love You' (Mario)
-Joe, Mercedes, Sam, 'Stereo Hearts' (Gym Class Heroes)
-Rory, 'Home' (Michael Buble)
-Mercedes, 'I Will Always Love You' (Whitney Houston)
-Rachel's dads, 'You're The Top' (Cole Porter)
-Quinn & Mercedes, 'Cherish'/'Cherish' (Madonna/The Association)
-'Glee' Cast, 'Love Shack' (The B-52's)