Coccus (plural cocci) can be used to describe any bacterium that has a spherical shape. It is one of the three distinct types of bacteria shapes, the other two being bacillus (rod-shaped) and spirillum (spiral-shaped) cells. Coccus is an English loanword of a Neolatin noun, which in turn stems from the Greek masculine noun kokkos (κόκκος) meaning "berry".

The term 'coccus' is used in botany to denote a mericarp or 1-seeded segment of a schizocarp.

Like all bacteria, each single coccus bacterium is an entire living organism. However, some species exist in groups of cells. If they do group together, the patterns they arrange themselves in are given certain names based on the shape. Diplococci are arranged in two-cell pairs; these may represent several different genera. Bacteria in the Streptococcus genus are arranged in chains. Bacteria in the Sarcina genus typically form a cuboidal arrangement of eight cells. Staphylococcus is a genus of bacteria characterized by cells arranged in tetrad clusters (four cells in a square formation) or large, often irregular, clusters. While groups of cells together form these characteristic shapes, the individual bacterial cells themselves will appear as distinct circles within the chain or cluster.

Irene Grandi (born 6 December 1969) is an Italian singer.

Irene Grandi was born in Florence.

She debuted in the Sanremo Music Festival in the category New Proposed with "Fuori", in 1994, which was later won by Andrea Bocelli, who was also debuting the same year.

Her first album, Irene Grandi, contained songs written with Eros Ramazzotti ("Sposati subito") and Jovanotti ("T.V.B."). In 1995, her second album, In vacanza da una vita, was released. It contained such songs as "In vacanza da una vita" and "Bum bum". These albums were followed up by Per fortuna purtroppo, Verde rosso e blu, Kose da Grandi, and Indelebile among others.

In 2000, she placed second in the Sanremo Music Festival with a song written together with Vasco Rossi.

She performed lead vocals on the song "Blue", the closing track on French producer Hector Zazou's 2003 album Strong Currents.

In 2004, she made her debut as television presenter with Marco Maccarini at the Festivalbar.

She participated as a contestant in the 60th edition of the Sanremo Music Festival in 2010 with her song La cometa di Halley (Halley's Comet).

Yulia Zagoruychenko (born September 11, 1981) is originally from Russia where she began dancing at the early age of four. As a child, she enjoyed watching and copying dancers on TV so her mother agreed to take her to dance classes where she did folk dancing for four years. She then moved into ballroom dancing. At the age of 11, Zagoruychenko started to teach kids to earn some money which she then gave to her parents. For financial reasons, she could not afford to dance both Ballroom and Latin and so at the age of 16 she chose to pursue Latin, but when she was 21 she decided to move to America. With her previous partner Maxim Kozhevnikov, Zagoruychenko became the US National Professional Champion and shortly after that, she began dancing with Riccardo Cocchi.

Currently Zagoruychenko and her partner, Riccardo Cocchi, are World Latin Professional Champions and 3-times undefeated US National Professional Latin Champions.

Stefanos Korkolis (born 12 September 1960) is a Greek composer and pianist. He was born in Athens and grew up in Patissia. He is a nephew of renowned Greek composer Mimis Plessas.

He was considered a prodigy for starting playing the piano since the age of five without prior lessons. His first teacher was piano soloist Marika Papaioannou. Until the age of seven he performed as a self-taught pianist. At age eleven he enrolled in the Athens Conservatoire. His piano teacher was Phoebe Vallinda and harmony teacher was Menelaos Pallantios. Two and a half years later he partakes in an international piano contest winning the first prize, as well as a scholarship from the French government. The latter enabled him to continue his studies at École Normale Supérieure in Paris.

From the age of 17 and for 11 years he was known as "... the French pianist Korkolis, of Greek nationality...". He attended seminars on chorus direction and instrumentation by Vladimir Horowitz, Yvonne Lefébure and others. During that period he composed music for theatrical and cinematic productions. Eleven years later he abandoned classical music which resulted in the revocation of his scholarship. As a composer and a director he started releasing independent records some of which reached the status of gold.