The World Cup runners-up, who will be joined in the June 14-July 14 tournament in Germany by Portugal and Belgium as one of the first three teams to qualify, kept a perfect record in Group B with six wins.
Portugal's Telma Encarnacao scored one goal and set up the other in a 2-0 win over fellow debutants Vietnam, sending the Southeast Asian side out of the tournament.
It was a historic night for Ronaldo who became the first player to make 200 international appearances.
The 38-year-old, who missed the final matchday due to injury, said the league was very competitive but that there were many opportunities to grow.
Al-Nassr failed to win any titles this season and finished the league in second place, five points behind champions Al-Ittihad.
The singer shared photos and videos on her social media page.
Brazilian Talisca also hit the net twice in the 5-0 victory over Al-Adalah on Tuesday and is the league's joint top-scorer with 16 goals.
The fan messaged the midfielder for 300 consecutive days.
Cristiano Ronaldo set a new record for the most international caps as Portugal played Liechtenstein on Thursday.
Al-Ittihad's fans taunted Ronaldo throughout the match, repeatedly chanting the name of his rival, Lionel Messi.