Ai Otsuka (Da Zhong  Ai , Otsuka Ai, born September 9, 1982) is a Japanese singer-songwriter from Suminoe-ku, Osaka, Japan. She is a popular artist on the Avex Trax label and is best known for her 2003 hit "Sakuranbo," which stayed in the Top 200 Oricon Weekly Singles Chart for 103 weeks. A piano player since age four, Otsuka composes and co-produces her own songs, as well as writes her own lyrics. Her music ranges from upbeat pop/rock music to ballads.

"Smily/Biidama" was her first single to be released after Love Jam. Both songs from the single were used for commercials. "Smily/Biidama" sold 110,512 copies during its debut week and charted at first place. "Smily/Biidama" sold a total of 308,338 copies in 2005, placing it as the twenty-sixth single of that year.  It was during this time, in June 2005, that Otsuka made her acting debut with the drama Tokyo Friends. Unlike most dramas, the series was directly released on DVD and never aired on TV. The drama used three songs as its theme song, Boo Bee Benz's "To Me" and "Kimi to Iu Hana," as well the coupling song to her sixth single, "Friends: Sabakan Ver." All three tracks would eventually be included in the soundtrack for the drama's movie sequel.  Otsuka released her tenth single in 2005, "Neko ni Fusen" in middle of the year in July. "Neko ni Fusen" was her lowest single that year, only reaching third on the chart and selling 111,324 copies. It placed ninety-second on the 2005 yearly charts.  Otsuka's single "Planetarium", was released on September 20, 2005. This was her last single of that year. "Planetarium" sales of 315,669 was her second highest single second only to "Sakuranbo," before her third studio album was released. "Planetarium" was used as the insert song for the live action version of the drama Hana Yori Dango.  Love Cook, her third studio album, came out on December 14, 2005. In its first week, it sold 335,000 copies. The promotional videos for this album were filmed as mini-dramas. She also hosts a radio show on JOQR Recomen!! AM1134hHz called Otsuka Ai no ai-r jack.

What year was Love Cook released?
December 14, 2005.