Answer the question at the end by quoting:

The Beatles were an English rock band formed in Liverpool in 1960. With members John Lennon, Paul McCartney, George Harrison and Ringo Starr, they became widely regarded as the foremost and most influential music band. Rooted in skiffle, beat and 1950s rock and roll, the Beatles later experimented with several musical styles, ranging from pop ballads and Indian music to psychedelia and hard rock, often incorporating classical elements and unconventional recording techniques in innovative ways. In 1963 their enormous popularity first emerged as "Beatlemania"; as the group's music grew in sophistication, led by primary songwriters Lennon and McCartney, the band were integral to pop music's evolution into an art form and to the development of the counterculture of the 1960s.
In Icons of Rock: An Encyclopedia of the Legends Who Changed Music Forever, Scott Schinder and Andy Schwartz describe the Beatles' musical evolution:  In their initial incarnation as cheerful, wisecracking moptops, the Fab Four revolutionised the sound, style, and attitude of popular music and opened rock and roll's doors to a tidal wave of British rock acts. Their initial impact would have been enough to establish the Beatles as one of their era's most influential cultural forces, but they didn't stop there. Although their initial style was a highly original, irresistibly catchy synthesis of early American rock and roll and R&B, the Beatles spent the rest of the 1960s expanding rock's stylistic frontiers, consistently staking out new musical territory on each release. The band's increasingly sophisticated experimentation encompassed a variety of genres, including folk-rock, country, psychedelia, and baroque pop, without sacrificing the effortless mass appeal of their early work.  In The Beatles as Musicians, Walter Everett describes Lennon and McCartney's contrasting motivations and approaches to composition: "McCartney may be said to have constantly developed - as a means to entertain - a focused musical talent with an ear for counterpoint and other aspects of craft in the demonstration of a universally agreed-upon common language that he did much to enrich. Conversely, Lennon's mature music is best appreciated as the daring product of a largely unconscious, searching but undisciplined artistic sensibility."  Ian MacDonald describes McCartney as "a natural melodist - a creator of tunes capable of existing apart from their harmony". His melody lines are characterised as primarily "vertical", employing wide, consonant intervals which express his "extrovert energy and optimism". Conversely, Lennon's "sedentary, ironic personality" is reflected in a "horizontal" approach featuring minimal, dissonant intervals and repetitive melodies which rely on their harmonic accompaniment for interest: "Basically a realist, he instinctively kept his melodies close to the rhythms and cadences of speech, colouring his lyrics with bluesy tone and harmony rather than creating tunes that made striking shapes of their own." MacDonald praises Harrison's lead guitar work for the role his "characterful lines and textural colourings" play in supporting Lennon and McCartney's parts, and describes Starr as "the father of modern pop/rock drumming".

How did they develop their style?

Although their initial style was a highly original, irresistibly catchy synthesis of early American rock and roll



Answer the question at the end by quoting:

Sean John Combs was born on November 4, 1969 in Manhattan's Harlem neighborhood in New York City, and was raised in Mount Vernon, New York. His mother, Janice (Smalls), was a model and teacher's assistant, and his father, Melvin Earl Combs, served in the U.S. Air Force and was an associate of convicted New York drug dealer Frank Lucas. At age 33, Melvin was shot to death while sitting in his car on Central Park West, when Combs was 2 years old. Combs graduated from the Roman Catholic Mount Saint Michael Academy in 1987.
In April 1999 Combs was charged with assault as a result of an incident with Steve Stoute of Interscope Records. Stoute was the manager for Nas, with whom Combs had filmed a video earlier that year for the song "Hate Me Now". Combs was concerned that the video, which featured a shot of Nas and Combs being crucified, was blasphemous. He asked for his scenes on the cross to be pulled, but after it aired unedited on MTV on April 15, Combs visited Stoute's offices and injured Stoute. Combs was charged with second-degree assault and criminal mischief, and was sentenced to attend a one-day anger management class.  Forever, Combs' debut solo studio album, was released by Bad Boy Records on August 24, 1999, in North America, and in the UK on the following day. It reached number two on the Billboard 200 and number one on the Top R&B/Hip-Hop Albums chart, where it remained for one week before being knocked off by Mary J. Blige's fourth album, Mary. The album received positive to mixed reviews from music critics and spawned three singles that have charted on the Billboard charts. It peaked at number four on the Canadian Albums Chart, Combs' highest-charting album in that country.  On December 27, 1999, Combs and his then-girlfriend Jennifer Lopez were at Club New York in Manhattan when gunfire broke out. After a police investigation, Combs and fellow rapper Shyne were arrested for weapons violations and other charges. Combs was charged with four weapons-related charges and bribing his driver, Wardel Fenderson, to claim ownership of his gun.  With a gag order in place, the highly publicized trial began. Combs' attorneys were Johnnie L. Cochran Jr. and Benjamin Brafman. Combs was found not guilty on all charges; Shyne was convicted on five of his eight charges and sentenced to ten years in prison. Combs and Lopez broke up shortly after. A lawsuit filed by Fenderson, who said he suffered emotional damage after the shooting, was settled in February 2004. Lawyers for both sides, having agreed to keep the settlement terms secret, said that the matter was "resolved to the satisfaction of all parties".

Who was Sean Combs dating at that time?
his then-girlfriend Jennifer Lopez