Born the daughter of prosperous Chinese immigrants, young Jubilation "Jubilee" Lee was sent to an exclusive Beverly Hills school, where her talent for gymnastics was discovered. Jubilee spent much of her time rollerblading with friends at the local mall, but ultimately ran afoul of mall security. Facing juvenile detention if caught, Jubilee panicked and first manifested her mutant ability to generate explosive energy. Soon after, her parents were mistakenly killed by hitmen. Jubilee fled to the only home she had left - the mall. She survived as a petty thief and street performer, but mall security eventually tired of her eluding capture and called in a team of novice mutant hunters, the M-Squad. That same day, the mall was visited by the female members of the X-Men. When the M-Squad attacked Jubilee, the X-Men came to her aid and then left via a portal created by Gateway. Intrigued, Jubilee followed them through and arrived at the X-Men's base in outback Australia. She lived in the tunnels beneath the town until the X-Men disbanded, after which their former member Wolverine returned to the town and was ambushed by the cyborg Reavers, who crucified him. Jubilee helped him to escape and stayed by his side while he recovered from his ordeal, forming a close bond. After rescuing another former X-Man, Psylocke, from the Mandarin's control in Madripoor, the trio traveled to Genosha to aid in opposing Cameron Hodge. Jubilee accompanied them back to the U.S., where she joined a reformed X-Men. Eventually, Jubilee learned the truth about her parents' deaths and managed to exact revenge on the assassins, though she stopped short of killing them. Jubilee then joined the Generation X training team that was formed by Professor Xavier. As one of the founding members, Jubilee learned to further control her explosive powers and improve upon her field leadership skills. During her stay with Generation X, Jubilee managed to aid her teammates in battles against Emplate, Sentinels, and the Juggernaut, among others. During Operation: Zero Tolerance, Bastion captured Jubilation Lee in order to get information on the X-Men. She resisted his mental probes for a considerable amount of time and also made a few escape attempts. After triggering a switch that freed the captured X-Men, she befriended Bastion's assistant, Daria, who helped her escape successfully. Jubilee was then confronted by a Prime Sentinel in the desert, but defeated it with the help of Wolverine who tracked her scent. She stayed with the X-Men for a brief stint, and then returned to her Generation X teammates. While training at the Massachusetts Academy, Jubilee discovered that Hunter Brawn was behind the death of her parents. Outraged, she took justice into her own hands and ended up throwing him in jail.

After Generation X disbanded, Jubilee returned home to try an acting career, which was ultimately short-lived due to an unscrupulous agent exploiting her. Jubilee then briefly joined her former headmaster Banshee's paramilitary X-Corps. After that team was dissolved, Jubilee was one of several mutants captured by the mutant-hating Church of Humanity, who crucified them on the grounds of the Xavier Institute. Jubilee was one of the few to survive, thanks to the X-Man Archangel's newfound healing ability, and she rejoined the X-Men, adventuring with them against the threat of Nightcrawler's father, Azazel.

When Cyclops and Emma Frost took on the shared duty of headmaster of the Institute, the X-Men were restructured into three teams, and Jubilee was taken off the active roster. She went home to live with her Aunt Hope and returned to school, becoming a student counselor before being caught up in her Aunt's secret life as a spy. Soon after, Jubilee returned to the Institute.

Jubilee was depowered due to the events of "M-Day". Shortly afterwards, she was interviewed by Sally Floyd as part of her Ex Mutant Diary series. She then got a job working at a half-way house of sorts for fellow depowered mutants. While at her stay working at the clinic, Wolverine bumped into her. In a matter of seconds, Omega Red broke into the facility and took Jubilee as a hostage. She was gravely wounded when the building she was held in exploded, as a steel beam fell into her abdomen. Without hesitation, Logan surrendered himself over to S.H.I.E.L.D. custody as a bargain with them to save her life.

Recently she has been under the new codename of Wondra, and is affiliated with a renegade group of New Warriors that are opposed to hero registration. Even though she lost her mutant powers, Jubilation Lee brandishes gauntlets on her arms that give her incredible superhuman strength.