Snowflake unlikely that any two snowflakes are alike due to the estimated 10 (10 quintillion) water molecules which make up a typical snowflake, which grow at different rates and in different patterns depending on the changing temperature and humidity within the atmosphere that the snowflake falls through on its way to the ground. Snowflakes that look identical, but may vary at the molecular level, have been grown under controlled conditions. Although snowflakes are never completely symmetrical, a non-aggregated snowflake often grows so as to exhibit an approximation of six-fold radial symmetry. The symmetry gets started due to the hexagonal crystalline structure
This Is How We Do "a sequel of sorts to both 'California Gurls', and 'Last Friday Night (T.G.I.F.)', Perry's previous party-hearty mega-hits." Lyrically, "This Is How We Do" finds Perry sing-talking about her hangout routine with her friends, also encouraging her fans to spend money they don't have just so they can have a good time, as noted by Stephen Thomas Erlewine of AllMusic. Empire claimed that on the song, Perry and her friends "are on the prowl for tacos and "hotties", "sucking really bad at Mariah Carey-oke". While also claiming that the song recalls her own 'Last Friday Night (T.G.I.F.)', Ben Ratliff of "The