Acts 1:15-26 (NASB) Displays in my opinion an example of the Apostles praying to Jesus specifically to show which of these chosen men would serve as an Apostle to replace Judas. The authority to choose Apostles was given to Jesus. It was Jesus who later on chose Paul to be an Apostle. Therefore I think the Apostles prayed to Jesus in this instance.

Also, we sing songs about Jesus, we read that Jesus accepted worship while on earth. Why do we think it not proper to pray to him or give thanks to him in prayer? Jesus is God. The only member of the Godhead that we read absolutely nothing about worshipping is the Holy Spirit. No command, example or inference in the Bible about worshipping the Holy Spirit. We are to abide in the Spirit by abiding in the Word.

15At this time Peter stood up in the midst of the brethren (a gathering of about one hundred and twenty persons was there together), and said,

16"Brethren, the Scripture had to be fulfilled, which the Holy Spirit foretold by the mouth of David concerning Judas, who became a guide to those who arrested Jesus.

17"For he was counted among us and received his share in this ministry."

18(Now this man acquired a field with the price of his wickedness, and falling headlong, he burst open in the middle and all his intestines gushed out.

19And it became known to all who were living in Jerusalem; so that in their own language that field was called Hakeldama, that is, Field of Blood.)

20"For it is written in the book of Psalms,
'LET HIS HOMESTEAD BE MADE DESOLATE,
AND LET NO ONE DWELL IN IT';
and,
'LET ANOTHER MAN TAKE HIS OFFICE.'

21"Therefore it is necessary that of the men who have accompanied us all the time that the Lord Jesus went in and out among us--

22 beginning with the baptism of John until the day that He was taken up from us--one of these must become a witness with us of His resurrection."

23So they put forward two men, Joseph called Barsabbas (who was also called Justus), and Matthias.

24And they prayed and said, "You, Lord, who know the hearts of all men, show which one of these two You have chosen

25to occupy this ministry and apostleship from which Judas turned aside to go to his own place."

26And they drew lots for them, and the lot fell to Matthias; and he was added to the eleven apostles.