Rednex is a Swedish musical group, known for their unique sound comprising modern dance, pop and techno sounds mixed with classical country music, folk, and bluegrass elements.
 The band originally consisted of the lead singer Mary Joe (Annika Ljungberg), alongside Bobby Sue (Kent Olander), Ken Tacky (Arne Arstrand), Billy Ray (Jonas Nilsson) and Mup (Patrick Edenberg).
 The group enjoyed success throughout the 1990s with novelty hits such as "Cotton Eye Joe", "Old Pop in an Oak", "The Spirit of the Hawk" and "Wish You Were Here".
 Pat Reiniz (Patrick Edenberg) also served as the band's producer.
Skin cancer, or neoplasia, is the most common type of cancer diagnosed in horses, accounting for 45 to 80% of all cancers diagnosed.
 Sarcoids are the most common type of skin neoplasm and are the most common type of cancer overall in horses.
 Squamous-cell carcinoma is the second-most prevalent skin cancer, followed by melanoma.
 Squamous-cell carcinoma and melanoma usually occur in horses greater than 9-years-old, while sarcoids commonly affect horses 3 to 6 years old.
 Surgical biopsy is the method of choice for diagnosis of most equine skin cancers, but is contraindicated for cases of sarcoids.
 Prognosis and treatment effectiveness varies based on type of cancer, degree of local tissue destruction, evidence of spread to other organs (metastasis) and location of the tumor.
 Not all cancers metastasize and some can be cured or mitigated by surgical removal of the cancerous tissue or through use of chemotherapeutic drugs.
"Happy" is a song written, produced, and performed by American singer and record producer Pharrell Williams, from the "Despicable Me 2" soundtrack album.
 It also served as the lead single from Williams' second studio album, "Girl" (2014).
 It was first released on November 21, 2013, alongside a long-form music video.
 The song was reissued on December 16, 2013, by Back Lot Music under exclusive license to Columbia Records, a division of Sony Music.
Happy 2b Hardcore is a DJ mix album by Canadian DJ Anabolic Frolic.
 It was released in 1997 on American breakbeat label Moonshine Music and is the first series in Frolic's "Happy 2b Hardcore" series of DJ mix albums, documenting the emergence of happy hardcore music in the United Kingdom and Europe.
 The series itself is a spin-off of Moonshine's "Speed Limit 140 BPM+" series of fast-tempo dance music compilations.
 The album was conceived to introduce American audiences to happy hardcore, and contains sixteen of the genre's anthems which carry many of happy hardcore's defining characteristics, such as fast tempo, frantic breakbeats, major key tonality, off-kilter, quirky keyboard effects and "semi-melodies."
"Tacky" is a song by American musician "Weird Al" Yankovic from his fourteenth studio album, "Mandatory Fun" (2014).
 The song is a parody of the 2013 single "Happy" by Pharrell Williams.
 The song mocks questionable taste in fashion as well as activities considered gauche.
 Yankovic recorded the song as one of the last on "Mandatory Fun", and received Williams' approval directly, through email.
 He remarked he was "honored" to have his work spoofed by Yankovic.
Uterine cancer or womb cancer is any type of cancer that emerges from the tissue of the uterus.
 It can refer to several types of cancer, with cervical cancer (arising from the lower portion of the uterus) being the most common type worldwide and the second most common cancer in women in developing countries.
 Endometrial cancer (or cancer of the inner lining of the uterus) is the second most common type, and fourth most common cancer in women from developed countries.
 Risk factors depend on specific type, but obesity, older age, and human papillomavirus infection add the greatest risk of developing uterine cancer.
 Early on, there may be no symptoms, but irregular vaginal bleeding, pelvic pain or fullness may develop.
 If caught early, most types of uterine cancer can be cured using surgical or medical methods.
 When the cancer has extended beyond the uterine tissue, more advanced treatments including combinations of chemotherapy, radiation therapy, or surgery may be required.
Alay (or "4L4Y", "Anak Layangan ", "Anak Jablay" or "Anak Lebay ") is an Indonesian pop culture phenomenon.
 It is a stereotype describing something "tacky" and "cheesy" "norak " or "kampungan ".
 The Alay culture phenomena spans a wide array of styles in music, dress, and messaging.
 It has often been compared to that of the Jejemon phenomenon originating from the Philippines, and Harajuku from Japan.
 Although, the former emerged much later and the latter was even admired in the West.
Tack cloth (tack rag; tac cloth) is a specialized type of wiping cloth that is treated with a tacky material.
 It is designed to remove loose particles of dust, dirt and lint that would contaminate a surface that is to be painted, coated, laminated, photo-etched, or otherwise finished.
Rick Detorie is the creator of the popular comic strip "One Big Happy".
 He is the author of 14 humor books, including "No Good Men", "No Good Lawyers", "Totally Tacky Cartoons", "Catholics" and "How to Survive an Italian Family".
 He currently resides in Venice, California.
Phacelia viscida is a species of phacelia known by the common names sticky phacelia and tacky phacelia.

Question: What type of music does Tacky and Happy have in common?
Answer: song