Circle K is an international chain of convenience stores, founded in 1951, in El Paso, Texas, United States. It is owned and operated by the Canadian-based Alimentation Couche-Tard.

Since the 1980s, Circle K has been the largest company-owned convenience-store chain (i.e. of non-franchised stores) in the U.S. It was second in overall number of U.S. stores to 7-Eleven. However by 1989, it faced strong competition from convenience stores owned by oil companies, and Circle K declared bankruptcy in 1990. By July 2010, Circle K had dropped to fourth rank in number of stores (3,455), then behind BP (4,730 stores) and Shell (4,630 convenience stores).

Some Circle K stores operate gasoline pumps selling Union 76-branded motor fuels; others sell Mobil, Marathon, ConocoPhillips, Irving, BP, Sunoco or Shell-branded fuel. Until mid-2006, nearly all Circle K stores in South Texas sold Citgo-branded fuel; however, those stores have dropped the Circle K name and now operate as Stripes Convenience Stores and are served by Valero-branded fuel. Circle K stores in northeast Ohio vary depending upon what stores they used to be: the majority are former Citgo/Holland Oil, whose gas is branded as Circle K; others are remnants of the Lawson's/Dairy Mart chain, which sell gas from other companies. Some locations, especially older outlets in the company's core markets of the American Southwest, do not sell gasoline.

Guadalupe Rivera Saavedra (born January 30, 1972) in La Barca, Jalisco, Mexico, is a Mexican regional singer.

As a youngster, Lupillo, his sister Jenni Rivera and the rest of the Rivera family moved to Long Beach California, where Lupillo graduated from Long Beach Polytechnic High School in 1990.

Rivera wanted to be a restaurant owner. His father Pedro Rivera, however, was a recording label/studio owner(Cintas Acuario) . Wanting to give his son a hands-on business experience, Mr. Rivera hired his son Lupillo to work at the studio when a contracted singer failed to show up for a recording session. Lupillo was given the task of looking for local talent at bars, with the idea that some of that talent could be signed by his father's company. When Lupillo first started singing he was called "El Torito" Lupillo Rivera.Later when becoming more famous he was known as "El Toro del Corrido. Lupillo's uncle was a semi-famous professional boxer, known as El Toro Rivera to Mexican boxing fans. By 1999, Lupillo began to sing using his own name[Lupillo]. By then, he had already signed with Sony Discos. His star began to rise meteorically at that point. In 2001, he was awarded a Premios lo Nuestro.